Sets of High Strength Hexagon Bolt,

Hexagon Nut. and Plain Washers for

Friction Grip Joints

1. S c o p e

T h i s J a p a n e s e Indus t r i a l S t a n d a r d s p e c i f i e s t h e s e t s of high-strength hexagon bo l t , hexagon nut and plai'n w a s h e r s f o r f r i c t i o n g r i p jo in t s , h e r e i n a f t e r r e f e r r e d to a s the "se t s" , t o be u s e d mainly f o r s t e e l cons t ruc t ions . -

Remark : In t h i s s t a n d a r d , . u n i t s a n d numer ica l va lues given in { ) a r a based on the I n t e r n a t i o n a l S y s t e m of Units (SI ) , and are given f o r r e f e r e n c e .

2. Composi t ion

A s e t s h a l l b e composed of o n e p i e c e of high-strength hexagcn bolt f o r f r i c t i o n g r i p jo in t , h e r e i n a f t e r r e f e r r e d t o as the Itbolt" , one p iece of high- s t r e n g t h hexagon nut f o r f r i c t i o n g r i p jo in t , h e r e i n a f t e r r e f e r r e d to a s the "nut" , a n d two p i e c e s of high-s t rength p la in w a s h e r s f o r f r i c t i o n g r i p jo in t , h e r e i n a f t e r r e f e r r e d to as t h e " w a s h e r " , r e s p e c t i v e l y spec i f i ed in 3.

-B 1156--

?. Classes and Grades

The s e t s shall be classified into Classes 1 , 2 and 3 according to mechanical properties of the parts constituting the se t s , and each c lass shall be further subclassified into A and B according to torque coefficient. The grades of the par ts constituting the set shall be classified a s given in Tables 2 to 5 according to the mechanical properties.

The c lasses in combination with the grades a c c o r d ~ n g to mechanical prop- e r t i e s of the constituting par ts shall be a s given in Table 1.

*i

Table 1

Remark: Those which a r e given in parentheses should not apply a s far a s possible.

4. Mechanical Properties

Classification of se t

4.1 Mechanical Properties of Bolt

C l a s s according to mechanical properties

Class 1

Class 2

(Class 3)

Applicable grade according to mechani- cal properties of constituting par ts

4.1.1 Mechanical Proper t ies of Test Piece Machined from Bolt The mechanical ropert ties of the tes t piece machined from bolt shall co rn~lv with the

Class accordingto torque coefficient

A

B

A

B

A

. . requiremenis oi Table 2 , when the tes t piece i s subjected to the t e s t provided in 11.1.1 (1) (1.1).

I B

Washer

F 35

Bolt

F S T

F 10 T

(F 11 T)

The impact value, when particularly required, shall be- subject to an agreement between the part ies concerned.

Nut

F 10 ( F 8 )

F 10

Table 2

Grada according to mechanical propurt~er of bolt

F 8T --------

F 1 0 T

F 11 T

Note * 1 ~ / r n r n ~ = I MPa

proof strear

I$:;$ M min

{an. 6 min) - 90 min

i882.6 m~n.]

95 min (931.6 mi%)

Tonmil. atrenfl kgflmm' INlmm')

80 t 100 1704.5 6 980.7)

100 C. 120 j980.7 t 1176.8)

110 r- 130 !1078.7 G 1274.9)

E l o D F ~ ~ o ~

%

16 min

14 min

14 min

Reduction of area

%

45 m i n

40 m i n

40 min

4.1 . 2 Mechanical P r o p e r t i e s of Ful l -Size Bolt T h e mechanical p r o p e r t i e s of t h e ful l -s ize bol t , when t e s t e d i n a c c o r d a n c e with 1 1 . l . 1 (1 ) (1 .2) , s h a l l b e s u c h as not t o b r e a k a t l e s s than t h e t ens i l e load (min.) spec i f i ed i n T a b l e 3 and a l s o not t o b r i n g f o r t h head s e p a r a t i o n when the t e n s i l e load is increased . In add i t ion , when t h e bolt is t e s t e d i n a c c o r d a n c e with 11 . l . 1 ( 2 ) , t h e r e s u l t s s h a l l conform t o t h e h a r d n e s s r e q u i r e m e n t s of T a b l e 3 .

T a b l e 3 -

Remark: F o r t h e bolt which h a s been sub jec ted t o t h e t e n s i o n t e s t , the h a r d n e s s t e s t may be omitted, s u b j e c t t o t h e agreement between t h e parties concerned .

Crade according to mechanical properties ot bolt

F 8 T ----- F 1 0 T -

F 1 1 T

4.2 Mechanical P r o p e r t i e s of Nut T h e mechanica l p r o p e r t i e s of the nu t , when t e s t e d i n a c c o r d a n c e with 11 . l . 2. s h a l l conform t o t h e r e q u i r e m e n t s of T a b l e 4.

T a b l e 4

Hardnemm

18 !. 31

27 38 - . ,,,

Tensile load (mh. ) (kgf) (LN]

Designation ot screw threads

4.3 Hardness ' of Washer T h e h a r d n e s s of t h e w a s h e r , when t e s t e d i n a c c o r d a n c e with 11.1.3, s h a l l conform t o t h e r e q u i r e m e n t s of T a b l e 5.

T h e w a s h e r s s h a l l not be sub jec ted t o s u r f a c e h a r d e n i n g s u c h as c a r b u r i - ( s a t i o n , q u e n c h i n g and tempering.

T a b l e 5 . .

7 5 7

M 1 2

6740 (66.1 1

8430

G r a d e a c c o r d i n g t o mechanica l p r o p e r - ties of nu t

F 8 '

F 1 0

M 1 6

12600 1123.6) '

15700

A d 2 0 0

19600 (192.2)

24500 (240.3)

27000 (264.8)

(82.67) (151.0)

9270 (90.91) (169.71

G r a d e a c c o r d i n g t o mechanica l p r o p e r t i e s of washe-

F 35

G u a r a n t e e d load

S a m e as t h e t ens i l e load (rnin.) of bol t specif ied in T a b l e 3.

H a r d n e s s

H a r d n e s s

HRC 35 t o 45

M 3 0

44900 (440.3)

54100 (550.2)

61700 ' (645.1)

,

Min.

HRB 85

HRB 95

M27

36700 (359.9)

4SWO (150.1)

50500 (195.3)

M 2 2 I M 2 4

Max.

HRB 100

HRC 35

24200 1237.3)

30300 (297.1)

3 (326.51

28200. (276.61

35300 (316.2)

38800 (380.5)

5. Torque Coefficient of Set

The torque coefficient of the se t . when tested in accordance with 11.2, shall conform to the requirements of Table 6 . , where the value shall be obtained from the following formula:

k- = 'I' x 1000 J x .\'

where torque coefficient

7': torque (moment to fasten nut) (kgf.m) { N ' m } J : basic thread outside diameter of bolt (mm)

X : axial force of bolt 1') ( k g f ) { ~ } . .

Table 6

Notes ( I ) The axial force mentioned above means a tensile force to act in axial direction of the bolt caused by a torque to fasten the bolt.

Division

Mean of torque coefficient values of one manufacturing lot ( 2 )

Standard deviation of torque coefficient.-. values of one manufacturing lot ( 2 )

(') The one manufacturing lot. mentioned above means the lot of se t which the bolt, nut and washers of each identical lot constitute. The identical lot of the bolts, nots and washers mentioned herein, shall be a s defined below:

(1) The identical lot of the bolts is defined a s a manufacturice lot composed by the bolts, which a r e identical in:

Class of se t according to torque coefficient

(a) melt number of material (s teel ) ,

(b) c lass according to mechanical proper t ies ,

(c) designation of screw threads , , (d) length I ,

(e) machining process,

(f) heat treatment conditions, and

A

0.110 to 0.150

0.010 max.

(g) surface treatment conditions, when the bolts a r e subjected to surface treatment. However, the bolts having slight variations of length 1 may be considered to be of an identical lot.

. - (2) The identical lot of the nuts is defined as a manufactwing

lot composed by the nuts which a r e identical in:

B

0.150 to 0.190

0.013 max.

(a) melt number of material (s teel ) ,

-B 11k

(b) c l a s s accord ing , to mechanical p r o p e r t i e s ,

(c) designation of s c r ew threads , . f

(d) machining , p r o c e s s ,

(e) heat t reatment condition, and ,- -

(f) s u r f a c e t reatment condition, when the nuts are sub- jected t o s u r f a c e treatment.

. .

(3) T h e identical lot of the washers i s defined a s a manufactur- ing lot composed by the washers which a r e identical in:

(a) melt num+r of material ( s t ee l ) .

(b) c l a s s acco rd ing to mechanical p rope r t i e s ,

(c) de ' s i pa t ion of washer ,

(d) machining p r o c e s s ,

(e) heat t reatment condition, and

- (f) s u r f a c e t reatment condition, when the washe r s are . subjec ted t o su r f ace treatment. . . - . . .

!

4 Remark: A measure in t h e c a s e where the torque coefficient value t e s t . . P for the s e t is impossible due to s h o r t e r length r sha l l be taken

by a n agreement between the par t ies concerned.

-1 6. Shape and Dimensions

T h e shape and dimensions of the bol ts , .nuts and w a s h e r s sha l l be a s specif ied in Attached, Tab le s 1 t o 3.

7. S c r e w Threads

T h e sc rew th reads of the bol t s and nuts shal l be me t r i c coarse sc rew th reads specified in J I S B 0205, and t h e i r g rade sha l l be of 6 ~ / 6 ~ specif ied in J I S B 0209.

T h e s c r e w th reads of the bol t s sha l l have been made by th read rolling. . $

8. Appearance .

8.1 Appearance of Bolt T h e appearance of the bolt s h a l l be in compliance with the requirements of Attached Tab le 1 in sur face roughness , and , in addition, f r e e from quenching c r a c k s and such defec ts harmful t o u s e as f laws, b u r r s , r u s t and damage of s c r e w t h r e a d s .

8.2 Appearance of Nut T h e appea rance of the nut sha l l be in compliance with the requirements of Attached Tab le 2 in su r f ace roughness , and , in addition, f r e e from quenching c r a c k s and such de fec t s harmful to u s e a s f laws, b u r r s and ru s t .

8.3 Appearance of Washer T h e appearance of the w a s h e r sha l l be in c o m ~ l i a n c e with the reaui rements of Attached Table 3 i n s u r f a c e roughness , and -.

in ahdition, f r e e ~ f r o m Guenching c r a c k s and such de fec t s harmful t o use as f laws , b u r r s , r u s t and remarkable buckling.

9. Materials

The materials f o r the bol t s , nuts and washers s h a i l be such that the i r products may sa t i s fy the requirements of 4 to 8.

10. S u r f a c e Treatment

T h e bolts, nuts and washers may be subjected t o any su r f ace treatment, provided that it might not a f f ec t adverse ly the i r quality.

11. T e s t s and Measurements

11.1 T e s t s on Mechanical P rope r t i e s

11.1.1 T e s t s on Mechanical P rope r t i e s of Bolt T h e t e s t s on mechanical proper t ies of the bolt sha l l cons is t of the tension t e s t and hardness t e s t '

descr ibed below:

(1) Tension T e s t s of Bolt The tension t e s t s of t he bolt sha l l be ca r r i ed out f o r the t e s t p ieces machined from bolt and the full-size bolt.

(1.1) Tension T e s t s f o r T e s t P i eces The tension t e s t s fo r the t e s t pieces sha l l be made as described in , the following a r t i c l e s .

(1.1.1) T e s t P i ece T h e t e s t piece shal l be as follows:

(1.1.1.1) F o r the t e s t piece No. 4 t e s t p iece specif ied in J I S Z 2201 which has been machined from the bolt as shown in Fig. 1 (A) o r (B) sha l l be used.

Fig. 1 - -

(A) (B)

Gauge length

Diameter

Length of reduced sect ion P= approx. 6 0 rnm

Radius of f i l le t R- 15 mm min.

F o r the bolt with th reads of M 12 to M 24, when unable tq be machined to the dimensions given above, the dimensions L and D sha l l be determined assuming that L = 3.54 Dl and P sha l l be determined assuming that P-L + approx. 10 mm. In t h i s case, the dimension .

D sha l l be not l e s s than the value given in Tab le 7.

Tab le 7

(1.1 . I . 2) If i t is impossible to machine a t e s t piece owing to the ' shor tnes s of the bolt length r , a t e s t b a r taken out of the

material of the lot (3) identical with the bolt mater ia l i s mixed into the heat treatment lot same as fo r the bolt and, a f t e r the heat t reatment , the No. 4 t e s t piece specified in J I S Z 2201 sha l l be taken out of . that t e s t bar . In this c a s e , the dimension D of the t e s t piece sha l l be the same a s D given in Table 7. . ..

Designation of s c r e w threads

M 12

M 16

M 20

M 22

M 24

Note (3) T h e identical lot mentioned above is defined a s that identical to the bolt in melt number of material ( s tee l ) and diameter.

D (mm)

6

8

8 .

10

12

1 1 2) Tes t ing ~ e t h o d s T h e t e s t sha l l follow the method specified i n J I S 2 2241.

(1.2) Tension T e s t s of Full-Size Bolt The tension t e s t s of full-size bolt sha l l be c a r r i e d out as descr ibed below: Put a wedge ( see Fig. 3) , not less than HRC 45 in ha rdness , beneath the bearing.face of a bolt as shown in Fig . 2 by employment of a j ig having sui table construct ion, shape , dimensions and suff icient rigidity. Mate i t s s lope to be in contact with a s ide of the hexagon head, and make the j ig o r a nut to engage with the threa$ed port ion on the opposite s ide s o that some six th reads of the complete threads remain unengaged in the head s ide of the bolt. Examirie whether the bolt b reaks o r not unde r the tension load in ax ia l d i rec t ion (min.) given in Table 3 , and examine whether the sepa ra t ion of bolt head br ings forth o r not when f u r t h e r increas ing the tens i le load until the bolt b reaks down.

In the event of the s c r e w th reads coming out due to col lapse of the s c r e w th reads , r e t e s t sha l l be made a f t e r e i t h e r improving t h e thread accuracy of the jig o r the nut o r by inc reas ing the engaging length.

Fig. 2 (a) Fig- 2 (b) Fig. 3 Fig. 4

t

L e t t e r d ind i ca t e s t he bas ic ou ts ide d i a m e t e r of bolt t h r e a d , and c the c l e a r a n c e between the ins ide dia- m e t e r of wedge and dimension d.

Unit: mm

Remark: Where the s l ope of the j i g used f o r t h e t en s ion t e s t comes i n coritact with t h e bolt bea r i ng face, as shown i n F ig . 4, because of i t s s l ope same as incl inat ion of t h e wedge shown in F ig . 3 and the ha rdnes s and r ig id i ty are in compl iance with t he re- quirements of 1 1 . 1 . 1 (1) ( 1 . 1 . I ) , t h e wedge becomes u s e l e s s .

unthreaded

tJ

(2) Ha rdnes s T e s t of Bolt T h e h a r d n e s s t e s t of bol t s h a l l follow the method specif ied in JIS Z 2245. In t h i s case, measu r ing places s h a l l be positibned a t t h r e e points p e r one s amp le o n t h e s i d e face of t h e head . Mean of t he values obtained s h a l l be rounded bff t o a n i n t e g e r in a cco rdance with the r u l e p rov ided i n JIS Z 8401, and i t s h a l l be taken a s t he h a r d n e s s of the sample.

Under 2 d

6 +0 .5O -

2 d and o v e r

10 2 0 . 5 "

11 .1 .2 T e s t s on Mechanical P r o p e r t i e s of Nuts T h e t e s t s on the mechanical p r o p e r t i e s of nu t s s h a l l c o n s i s t of the h a r d n e s s t e s t and guaranteed load t e s t d e s c r i b e d below:

(1) H a r d n e s s T e s t of Nut T h e h a r d n e s s t e s t of nut s h a l l follow the method specif ied i n J I S Z 2245. In t h i s c a s e , m e a s u r i n g p laces s h a l l be posi t ioned a t t h r e e po in t s p e r one sample on t h e bear ing face of the nut. Mean of t h e va lues obtained s h a l l be rounded off to a n i n t e g e r in a c c o r d a n c e with t h e r u l e provided in J I S Z 8401, and i t s h a l l be t aken as t h e h a r d n e s s of the sample.

(2) Guaran teed Load T e s t of Nut T h e guaran teed load t e s t of nut s h a l l b e performed in a m a n n e r s i m i l a r t o the bolt t ens ion t e s t d e s c r i b e d in 11.1.1 (1) (1.2) by engag ing a sample nut in p l a c e of t h e i n t e r n a l th read j i g and th-en by app ly ing t h e guaran teed load given in T a b l e 4 , and the e x i s t e n c e of a b n o r m a l i t i e s on t h e sample s h a l l be examined. In t h i s case, t h e wedge is u s e l e s s . Ins tead of t h e bol t , an e x t e r n a l

. thread j i g f o r t e s t i n g may be used .

11.1 .3 H a r d n e s s T e s t of Washer T h e h a r d n e s s t e s t of w a s h e r s h a l l follow t h e method d e s c r i b e d in J I S Z 2245. In t h i s c a s e , t h e measur ing p l a c e s s h a l l be posi t ioned a t t h r e e points p e r o n e sample on t h e b e a r i n g face of t h e w a s h e r . ~ e a n of t h e value obtained s h a l l be rounded off t o a n i n t e g e r in a c c o r d a n c e with the r u l e d e s c r i b e d in J I S Z 8401, a n d i t s h a l l be taken as t h e h a r d n e s s of the sample.

11.2 T o r q u e Coeff ic ient T e s t of Set T h e t e s t f o r t o r q u e coefficient of s e t s h a l l be c a r r i e d out a s d e s c r i b e d below:

(1) T h e to rque coeff ic ient value t e s t of s e t s h a l l be performed f o r t h e set u n d e r t h e s e r v i c e condi t ion and the s a m e t e s t s h a l l not be r e p e a t e d for the s a m e sample.

(2) T h e t e s t s h a l l be per formed by employment of a t o r q u e t e s t e r o r a n a x i a l f o r c e mete r .

. . When t h e to rque t e s t e r is u s e d , t o r q u e and ax ia l f o r c e s h a l l be r e a d

t o half t h e r e s p e c t i v e s c a l e i n t e r v a l f rom t h e torque-axial f o r c e r e c o r d d iagram on t h e m e a s u r i n g a p p a r a t u s which h a s been connec ted t o t h e - t e s t e r . . -

When'a m e t e r o t h e r than t h e t o r q u e m e t e r is u s e d , t h e sample s h a l l be a t t ached to the a x i a l f o r c e m e t e r and t o r q u e s h a l l be appl ied g radua l ly t o the nut s o as not to c a u s e e r r o r . T h e t o r q u e s h a l l be m e a s u r e d with t h e t o r q u e m e t e r ( s e e J I S B 4650) and t h e bolt a x i a l f o r c e with t h e ax ia l f o r c e m e t e r t o half t h e s c a l e i n t e r v a l of t h e m e t e r .

In t h i s c a s e , t h e w a s h e r s h a l l not t u r n . If t h e j i g which c o m e s in cqn tac t with t h e bolt b e a r i n g f a c e is equal t o o r h a r d e r than h a r d n e s s o f the w a s h e r , the w a s h e r a t t h e bolt b e a r i n g face may be omitted.

( 3 ) . T h e m e a s u r e m e n t s of t h e t o r q u e appl ied to t h e nut and the bolt a x i a l f o r c e produced by t h e t o r q u e s h a l l be c a r r i e d o u t at t h r e e p l a c e s under t h e bolt a x i a l f o r c e r a n g i n g as given in T a b l e 8. In t h e c a s e of m e a s u r e m e n t s with a t o r q u e t e s t e r , t h e m e a s u r e m e n t s may be made only a t one point n e a r t o the median of the value given in T a b l e 8.

Table 8

--. --- I-' I U .r

Unit: kgf { k ~ ]

(4) The mean va lue ( o r only one calculated value for .one point measurement - with to rque t e s t e r ) of t h r e e calculated va lue s obtained by subst i tut ing into the formula given in 5. the t o rque and bol t axial fo r ce obtained by the measurement in a cco rdance with t he manne r de sc r i bed in (3) and the ba s i c dimension of s c r e w thread ou t s i de d i a m e t e r of bolt sha l l be rounded off t o t h r e e p laces of dec imals i n a c c o r d a n c e with the r u l e provided i n J I S Z 8401, and the r e s u l t sha l l be taken as the to rque coefficient va lue of t h e sample.

l;rade according to rncchanical prop~rl leB 01 boll

(5) The s c a l e i n t e rva l f o r t he torque-axial f o r c e d iagram obtained from the to rque t e s t e r sha l l be 1 kgf-rn { 10 N-rn) o r less f o r to rque and 1 $ o r less of t h e value t o be measured f o r the axial fo r ce .

( 6 ) T h e s c a l e i n t e rva l of t he torque meter s h a l l be 1 kgf -m (10 N-m } o r less, and the ins t rumenta l e r r o r sha l l be 1 $ o r less of t h e value indicated by each s c a l e within t he r a n g e of ax i a l f o r c e t o be measured .

Axial f o r c e 01 bolt ----- Designation of s c r e w thread8 --

(7) The s c a l e i n t e r v a l of the.axia1 f o r c e m e t e r s h a l l be 1 $ o r less f o r ax ia l f o r c e s t o be measu red , and t he i n s t rumen ta l e r r o r sha l l be 2 $ o r l e s s of t h e value indicated by each s c a l e within t h e r a n g e of ax i a l f o r c e to be measured .

11 .3 S u r f a c e De fec t T e s t s f o r Bol ts T h e c r a c k s , f l a w s and t h e l ike on bolt s u r f a c e s shal l be examined e i t h e r by the liquid pene t r an t t e s t i n g method specif ied in 4. of J I S Z 2343 o r by the magnetic pa r t i c l e t e s t i n g method spec i f ied in 5. of J I S C 0565.

M 27 1 hl 30

20600 ~27900 25100 t34100 120*0.L273.6) 1246.1 C33.i. 41

12. Inspection

M 24

l.W0~.21U)O (1%. 0 L 209.9I

hl 12 1 M 16

378nC 5130 7020 0,9530 " ' I 1I:ll. Oi =SO. 3Li( la. 84 L93.46)

12.1 Shave and Dimensional Inspection T h e inspec t ion f o r t h e shape and dimensions of a s e t s h a l l be performed by t e s t i ng t h e bo l t , nut and w a s h e r s const i tut ing the s e t by d i r e c t measurement , by employment of l imit gauge o r by o t h e r su i tab le m e a n s , and the t e s t r e s u l t s of e ach p a r t s h a l l meet t h e r equ i r e - ments specif ied in 6.

M 20 1 M 22

llWO t14900 13600 t.18.100 1107.9 C146.1) 1133.4 C 180.4

12.2 S c r e w T h r e a d s Inspect ion T h e s c r e w t h r e a d s inspectioh f o r t he bolt and nut s h a l l be c a r r i e d out by us ing the limit gauges ( f o r 6 H and f o r 6 g) f o r me t r i c c o a r s e s c r e w t h r e a d s specif ied i n J I S B 0251 o r by employment of o t h e r su i t ab l e s c r e w t h r e a d s inspec t ing instrument , and t h e r e s u l t s s h a l l comply with t he r equ i r emen t s of 7.

7

m. K A ~ T K A AGEB UTAMA J A K A R T A

12.3 Appearance Inspection T h e appearance inspection of a s e t shall be performed f o r the bolt, nut and washe r s constituting the s e t , and the r e su l t s of each pa r t shal l comply with the requirements specified in 8.1 to 8.3. The inspection f o r s u r f a c e defect sha l l be made in accordance with 11.3 and the s u r f a c e roughness inspection sha l l be made visually o r with the aid of su r f ace roughness measuring instrument specif ied in J I S B 0651 by comparing with the roughness comparison specimens specified in J I S B 0659.

. . . . .- - . . . - . . - .

1 2 .4 Inspection o n . ~ e c h a n i c a l P r o p e r t i e s

12.4.1 Inspection on Mechanical P rope r t i e s of T e s t P i eces Machined from Bolt T h e inspection r e su l t s on the mechanical proper t ies of t e s t pieces mechined from bolts shal l comply with the requirements of 4.1.1, when the test pieces a r e inspected on proof s t r e s s , tens i le s trength, elongation and re- duction of a r e a in accordance with the methods of 11.1.1 (1) (1.1).

In th is inspection, the cer t i f ied level of quality of the inspection lot(4) sha l l be laid down s o t h a t ' 1;s 0.125 % (5) (a+0.05) and 1:s 12.5$(6) ( 8<: 0.10).

T h e sampling inspection plan should be preferably in accordance with the sampling inspection plan by va r i ab le s provided in J I S Z 9C03.

Notes (4) One inspection lot mentioned above i s t he same a s one manufacturing lot defined in ( I ) , Note (2), 5.

(5) The value of I'r r 0.125 $ i s a representa t ive value, which rep- , r e s e n t s the values P, within the range from 0.11 3 to 0.140 $.

(6) The value of P, , 12.5 % is a representa t ive value, which rep- r e s e n t s the values p, within the range from 1 1 .3 to 14.0 $.

Remark: The notations P', P, , cr and fi a r e as defined in J I S Z 9001 . 12.4.2 Inspection on Mechanical P rope r t i e s of Full-Size Bolt The

inspection r e s u l t s on mechanical p rope r t i e s of full-size bolt sha l l comply with the requirements of 4.1.2, when the bolts are inspected on tensi le load and ha rdness in accordance with 11.1.1 (1) (1 .2) and 11.1.1 (2).

In t h i s insp&tion, the cert i f ied level of quality of the inspection lot(7) sha l l b e l a i d d o w n s o that 1)';; 0.125(5) (a+0.051 and lJ,b 8$(8) (B=0 .10 ) .

9 T h e sampling inspection plan should be preferably in accordance with the

4 sampling inspection plan by va r i ab le s provided in J I S Z 9003.

Notes (7) One inspection lo t mentioned above is the same as one manufacturing lo t defined in ( I ) , Note(2), 5.

(8) T h e value of P,,8 $ is a representa t ive value, which r ep resen t s the values P, within the r ange from 7.11 to 9.00 $.

12.4.3 Inspection on Mechanical P rope r t i e s of Vut T h e inspection r e s u l t s on mechanical p rope r t i e s of nut s h a l l comply with the requi rements of 4.2, when the nuts a r e inspected on the h a r d n e s s and guaranteed load in accordance with 11.1.2.

In th is inspection, the cer t i f ied level of quality of the inspection lot(9) shal l be laid do.wn as follows:

( 1 ) The certified level of quality of the inspection lot(9) in t he hardness inspection or the nut sha l l be laid down s o that 1 % ~ 0.125 $ (5) (cr+O. 05) and 1:s 8%(8) ( 8 = 0.10).

The sampling inspection plan should be preferably in accordance with the sampling inspection plan by va r i ab le s provided in J I S Z 9003-

(2) F o r the guaranteed load inspection of the nu t s , the check inspection shal l be ca r r i ed out f o r one sample s i z e of two o r m w e pieces f o r one inspection lot(9) and a l l of the samples sha l l meet the requirements of 4.2. * *

Note (9) One inspection lot mentioned above i s t he same as one manufacturing lot defined in (2). Note (2). 5.

12.4.4 Inspection on Hardness of Washer T h e inspection r e s u l t on ha rdness of the washer shal l comply with the requirement of 4.3, when the washe r i s inspected in accordance k i t h the methbd of 11.1.3.

In th is inspection, the ce r t i f i ed level of quality of the inspection lot( l0) sha l l be laid down s o that ID.> 0.125 $ (5) ( a + n . 05) and lo,& 8 $

( 1 5 + i ~ . Ill).

T h e sampling inspection plan should be preferably in accordance with the sampling inspection, plan by var iab les provided in J I S Z 9003.

Note (10) One inspection lot mentioned above is the same as one manufacturing lot defined in (3) . Note (2), 5.

12.5 Inspection on Torque Coefficient of S e t T h e inspection r e s u l t on torque coefficient value of the s e t sha l l c o m ~ l v with the reaui rement of 5.. when . " the s e t i s inspected in accordance with 1 1.2. .

In th is inspection, the cer t i f ied level of quality of the inspection lot(l l ) sha l l be laid down a s follows:

(1) T h e cert i f ied level of quality of s tandard deviation on the torque co- eff icient value of the inspection lot(1 l ) sha l l be s e t under t h e level of significance of 5 $ o r less and under t he s t anda rd r e l a t ive e r r o r of 8 $ o r less.

Remark: F o r t he application of ru l e of 12.5 ( I ) , i f t he p r o c e s s is in a s tab le s t a t e , the l a t e s t E - R control cha r t o r inspect ion da ta including the d a t a of t he lot t o be inspected may be used.

If par t icu lar ly r equ i r ed , t he sample s i z e may be lessened by slightly en larg ing the s tandard r e l a t ive e r r o r than the specified value, subject t o t he agreement between the p a r t i e s concerned.

(2) T h e cert i f ied leve ls of qual i ty f o r t he mean value of the torque co- efficient f o r the inspection lo t ( l1) sha l l be laid down s o that they may be not less than the value given in Tab le 9. I -

Note ( I1) One inspection lot mentioned h e r e i s the same as one manufacturing lot defined in Note (2), 5.

- 1490 - PT. KAQTK~ h ~ 8 IIVW J A K A R T A

Table 9

Remarks 1.. The notations met, ,111'. ale" and m" are as defined in J I S Z 9003.

2. F o r the s tandard deviation, the va lues obtained in accordance with 12.5 (1) sha l l be used.

Classif icat ion according to torque coefficient value

A

B

T h e s e t sha l l be designated in the o r d e r of the number o r t i t le of this standard, class according to mechanical proper t ies of t he s e t * c l a s s according to torque coefficient value of t he s e t , designation of s c r e w threads x bolt length ( I). and par t icu lar ly specified mat te rs ( l2) .

Note ( I2 ) T h e par t icu lar ly specified matter is to be shown in parentheses.

Example:

J I S B 1 186 C l a s s 1 B M16 x 50

Values in respect to upper limit

S e t of High St rength Hexagon Bolt , Hexagon Nut and Pla in ., . . (Flat

A Washers f o r Fr ic t ion Gr ip J o i n t s C l a s s 2 M20 x 60 point

m; ( a i 0 . 0 5 )

0.150

0.190

Values in. respect to lower limit

(Number of s tandard o r name of s tandard)

s

14. Marking '

14.1 Marking of Products T h e marking of the p a r t s constituting a s e t shal l

R be done as descr ibed below:

16 (1) The following pa r t i cu l a r s sha l l be marked e i t h e r in rel ief o r by starnp- i ng on the upper f a c e of the bolt head.

(1.1) Notation (F 8 T , F 10 T o r F 11 T) designating the class according to mechanical p rope r t i e s of bolt

(1 .2) Regis te red trademark o r identification mark of manufacturer

(2) T h e notation designating the class according to mechanical proper t ies of

: 5 t he nut sha l l be marked e i the r in rel ief o r by stamping by using marking symbol of Table 10 on the upper face of the nut.

- 1491 -

I I I ~ ~ (p+O. 10)

0.160

0.200

~n." ( a +O. 05)

0.110

0.150

~n," (p+O. l o )

0.100

0.140

T h e r e g i s t e r e d t rademark o r iden t i f i ca t ion mark of manufac ture r may be marked , sub jec t to t h e agreement between t h e p a r t i e s concerned .

T a b l e 10

C l a s s a c c o r d i n g t o mechanical p r o p e r t i e s of nut I Mark ing symbol

(3) T h e w a s h e r is exempted f r o m m a r k i n g t h e no ta t ion d e s i g n a t i n g t h e c l a s s a c c o r d i n g t o mechanical p roper t i es :

T h e r e g i s t e r e d t rademark o r ident i f icat ion m a r k of t h e m a n u f a c t u r e r may b e m a r k e d , s u b j e c t to the a g r e e m e n t be tween t h e p a r t i e s concerned .

14.2 Marking on P a c k a g e T h e package s h a l l be c l e a r l y m a r k e d with t h e fol lowing p a r t i c u l a r s :

( 1 ) T i t l e of t h i s s t a n d a r d

(2) c l a s s ' a c c o r d i n g to mechanical p r o p e r t i e s of s e t

(3) C l a s s a c c o r d i n g to t o r q u e coef f ic ien t va lue of s e t

(4) Designat ion of s c r e w t h r e a d s x bolt l eng th ( I )

( 5 ) Quant i ty

(6) P a r t i c u l a r l y s p e c i f i e d m a t t e r

(7) M a n u f a c t u r e r ' s name o r r e g i s t e r e d t r a d e m a r k

(8) Manufactur ing l o t number of s e t

(9) Month a n d y e a r of inspect ion f o r s e t

15. C a u t i o n s a t t h e T ime of C o n t r a c t

It is recommended t h a t the c o n t r a c t inc ludes t h e fo l lowing condi t ions:

f (1) that t h e m a n u f a c t u r e r of sets, bol ts , n u t s o r w a s h e r s is t o submit t h e -

c o n t r o l c h a r t s o r o t h e r qual i ty c o n t r o l d a t a o r i n s p e c t i o n d a t a s h e e t s . .. . .

(2 ) tha t t h e m a n u f a c t u r e r of t h e s e t s is t o be given t h e packag ing s t a n d a r d .

DY. KAATYKA A ~ M U J A K A R T A

Attached Table 1 . High Strength Hexagon Bolts for Friction Grip Joints

Eccentricity Inclination of Inclination of head bearing face . of side face

Unit: mrn

Notes (I3) The screw end may be either of flat point or of oval point.

(' 4, The position for measurement of the dimension d, shall be determined s o that l.sd,lr .

Remarks 1 . T h e length r of incomplete t h r e a d s sha l l number about two th reads and that or rull t h r e a d s about t h r e e th reads .

2 . The dimension d, may be made s o as to be approximately same a s the pitch diameter of s c r e w t h r e a d , subject to t he agreement between the ~ a r t i e s concerned.

In this c a s e , the rad ius r under the head may be made as follows:

Unit: mm

3 . T h e dimensions I marked with 0 indicate the recommended lengths r .

Designationor s c rew th reads

r

4. The dimensions I and s o t h e r than given in the table above, if part icularly requi red . may be used as specif ied. .

M l b I M1O M i 2

2 .5 t o 3 . 8

M 2 4

1 . 2 to 2 . 4

M 2 7 ( M 3 O

2 . 0 t o 3 . 3

Attached Table 2 . High Strength Hexagon Nuts for Friction Grip Joints

Eccentricity Inclination of Inclination' of bolt hole bearing face of s ide fa'ce

Unit: mm

Remark: Chamfering of the threaded portion of nut bearing face side . , s h a l l b e o f l . O t o 1 . 0 5 d i n d i a r n e t e r .

D e r ~ ~ n a r i o n ot screw

(4

M 12 --

M 16 . ---- -

M 20

M 22

M 24

M n

M 30

4 - b

H.X.

0.7

0.8

0.9

1.1

L2

1.3

1.5

dl,,.,

2 .

12

16

20

22

24

n

30

H B

E 1 k.F. 1 h M.X. ,

12 - 16

20

22

24

n

30

,= 22

-- 27

32

36

41

46

50

1'

D,

min.

20

25

29

33

38

43

47

c r-a.

25.4 -

31.2

37

41.6

47.3

53.1

57.7

7 -

f0.X

------

*0'4

r-.-

0 -U.B

---

-1

D

*-me

20

25

30

34

39

u

a

2- 0.4~ 0.8

Attached Table 3 . High Strength P l a i n Washers for Frict ion Grip Joints

Unit: mm

Remark: The f igures above show a plain w a s h e r with 45 O chamfer and that with radius r , and e i t h e r chamfer o r radius to be used i s optional.

DVSICI IDI I~ I~

12

16 -

20

22

24

n

D t c ,.I' r

&sic Tolerance A l ~ ~ r n . . d ~ ~ ~ ~ i o n 1 Tolnranee d,menlion

30

26

32

40

44

48

56

d

Hssl' ( T~rirranre tl#mc.t~sitltt

31 1 + k O ) 60 1 - I a 2 1 I I 2.8

0 - 0.8 3.2 1.5

4.5

0 - 1 2

6 f 0.7 2.4

0

13

17

21

23

25

28

+ 0.7 0

+ 0 . 8 0