GOST 10464-81 Lock Washers with External Teeth for Screws

This interstate standard applies to notched and stamped lock washers with teeth for screws with countersunk and raised countersunk heads at 90°, intended for fasteners with thread diameter from 3 to 12 mm.

The design and dimensions of the washers shall comply with those shown in the drawing and in Table 1 for notched washers, Table 2 for stamped washers.

Type 1

Type 2

• Dimensions are ensured by tooling

** Dimension for reference.

Table 1

Dimensions in mm

Nominal thread diameter of the fastener	d		D		D₁, max	s	H, min	l, min	Number of teeth z
	H₀ min.	H13	H₀ min.	h14
3	3.2	+0.18	6.1	-0.36	4.6	0.2	0.6	0.7	12
4	4.2		7.8		5.3	0.3	0.90	0.8	13
5	5.2		9.8		7.1	0.4	1.20	0.9
6	6.3	+0.22	11.8	-0.43	8.5	0.5	1.25	1.1	14
8	8.4		15.6		11.9	0.7	2.10	1.8	16
10	10.5	+0.27	19.2	-0.52	13.3			2.4
12	12.5		22.6		17.3	0.8	2.40	2.8	20

Table 2

Dimensions in mm

Nominal thread diameter of the fastener	d		D		D₁0.1	d₁0.1	L	l	s	H, min	Number of teeth z
	H₀ min.	H13	H₀ min.	h14
3	3.2	+0.18	5.8	-0.3	6.8	2.0	2.0	0.8	0.4	0.8	8
4	4.2		7.7	-0.36	8.2	2.2	2.5	0.9		1.00
5	5.2		8.8		9.5		2.5	1.0	0.5	1.25	9
6	6.3	+0.22	10.8	-0.43	11.9	2.8	3.2	1.4
8	8.4		13.3		14.3	3.0	3.5	1.8	0.6	1.50	10
10	10.5	+0.27	16.2		17.2	3.5	4.0	2.4	0.8	2.0

Note to Tables 1, 2. The tolerance on washer thickness s shall comply with the standards for the base material.

Example of a designation for a type 1 lock washer, for screws with countersunk and raised countersunk heads at 90° with thread diameter 8 mm, made of steel 65G, with zinc coating with chromate conversion, coating thickness 6 µm:

Washer 8.65G.016 GOST 10464-81

Same, type 2, made of bronze BrKMts3-1, without coating:

Washer 2.8.BrKMts3-1 GOST 10464-81

The twist angle of the teeth of stamped washers shall not exceed 43° to the plane of the washer. The direction of twist is right-hand.

Technical requirements — per GOST 10461-81.

The theoretical mass of the washers is given in the appendix.

Appendix (informative). Mass of steel washers

Nominal thread diameter of the fastener, mm	Theoretical mass of 1000 washers, kg.
	Type 1	Type 2
3	0.038	0.020
4	0.091	0.070
5	0.180	0.110
6	0.420	0.160
8	0.829	0.330
10	1.199	0.550
12	1.999	-

Note. To determine the mass of bronze washers, the mass values given in the table shall be multiplied by a factor of 1.08.

Corresponds to DIN 6797 V.