GOST 13438-68 Spherical Washers

The design and dimensions of spherical washers must conform to those shown in the drawing and table.

Dimensions in mm

Washer designation	Application	For shaft diameter	D	d	b	b₁	r	Weight, kg
7019-0391		6	12	6.4	2.4	1.0	9.0	0.001
0392		8	17	8.4	3.5		12.0	0.003
0393		10	21	10.5	4.0		15.0	0.005
0394		12	24	13.0	4.5	1.2	18.0	0.008
0395		16	30	17.0	5.3	1.2	22.0	0.012
0396		20	36	21.0	6.3	1.6	27.0	0.021
0397		24	44	25.0	8.0	2.0	32.0	0.042
0398		30	56	31.0	10.0	2.5	40.0	0.082
0399		36	68	37.0	14.0	4.0	50.0	0.166
0400		42	78	43.0	16.0	5.5	58.0	0.250
7019-0401		48	92	50.0	21.0	8.0	67.0	0.525

Example of designation for a spherical washer for a stud diameter of 6 mm:

Washer 7091-0391 GOST 13438-68

Material - steel grade 45 per GOST 1050-74. Substitution with other steel grades with mechanical properties not lower than those of steel grade 45 is permitted.

Hardness - HRC 40+45.

Unspecified dimensional tolerances: holes - H14, shafts - h14, others - +-t₂/2.

Coating - Chem. Ox. prm (coating designation per GOST 9.073-77). By agreement of the parties, other types of protective coatings may be applied.

Mark per GOST 18160-72.

Appendix 1. Reference height of spherical and conical washers assembled

mm

For shaft diameter	H
6	4.0
8	5.0
10	6.0
12	7.2
16	8.5
20	10.5
24	13.5
30	17.0
36	22.0
42	26.5
48	35.0

Corresponds to DIN 6319.