1

Cotter pin or splint (EN ISO

1234) is mounted above the nut and prevent

a littleloosening the

nut.

2

(initial shape)

d ≤ 28 mm (with one screw)

d > 28 mm (with two screw)

1 – special washer; 2 – lock washer

STAS 2241

3

Grooved nut STAS 5816

Lock-washer STAS 5815

Grooved nut lock

4

EElasticlastic lock nutlock nut

Lock nut

Nut II

Nut I

Free Tight

5

GrowerGrower (spring) washer (spring) washer SSRR 7666 7666

Elastic washers Elastic washers (STAS 10481, DIN 6797, DIN 6798)(STAS 10481, DIN 6797, DIN 6798)

6

Without Grower washer

(higher stiffness)

With Grower washer

Locking advantagewith Grower washer