GOST 10450-78 Diminished Washers

GOST 10450-78 applies to diminished washers of product grades A and C for fasteners with thread diameter from 1 to 48 mm.

DIMINISHED WASHERS. PRODUCT GRADES A AND C. Specifications	GOST 10450-78* Supersedes GOST 10450-68

Design and dimensions

The design and dimensions of washers shall comply with those shown in the drawing and table.

Example of a designation for a diminished washer for a fastener with thread diameter 12 mm, with the thickness specified in the standard, made of steel grade 08kp, with a 6 μm zinc coating, chromated:

Washer 12.01.08kp.016 GOST 10450-78

By agreement between the manufacturer and the consumer, it is permitted to:

• manufacture washers with other thicknesses;
• manufacture washers with internal diameters of 12.5, 14.5 and 16.5 mm.

The theoretical mass of washers is given in the appendix.

Thread diameter of fastener	d₁		d₂	s
	Product grade
	A	C
1.0	1.1	1.2	2.5	0.3
1.2	1.3	1.4	3.0	0.3
1.4	1.5	1.6	3.0	0.3
1.6	1.7	1.8	3.5	0.3
2.0	2.2	2.4	4.5	0.3
2.5	2.7	2.9	5.0	0.5
3.0	3.2	3.4	6.0	0.5
3.5	3.7	3.9	7.0	0.5
4.0	4.3	4.5	8.0	0.5
5.0	5.3	5.5	9.0	1.0
6.0	6.4	6.6	11.0	1.6
8.0	8.4	9.0	15.0	1.6
10.0	10.5	11.0	18.0	1.6
12.0	13.0	13.5	20.0	2.0
14.0	15.0	15.5	24.0	2.5
16.0	17.0	17.5	28.0	2.5
18.0	19.0	20.0	30.0	3.0
20.0	21.0	22.0	34.0	3.0
22.0	23.0	24.0	37.0	3.0
24.0	25.0	26.0	39.0	4.0
27.0	28.0	30.0	44.0	4.0
30.0	31.0	33.0	50.0	4.0
36.0	37.0	39.0	60.0	5.0
42.0	-	45.0	72.0	4.0
48.0	-	52.0	84.0	6.0

Technical requirements

Technical requirements — in accordance with GOST 18123-82.

Temporary corrosion protection, packaging and container marking — in accordance with GOST 18160-72.

Acceptance rules

Acceptance rules for washers — in accordance with GOST 17769-83.

Test methods

Test methods for washers — in accordance with GOST 18123-82.

Appendix. Mass of steel washers

Thread diameter of fastener, mm	Theoretical mass of 1000 washers, kg, product grade		Thread diameter of fastener, mm	Theoretical mass of 1000 washers, kg, product grade
	A	C		A	C
1.0	0.010	0.009	12.0	2.916	2.683
1.2	0.017	0.013	14.0	5.412	5.177
1.4	0.016	0.012	16.0	7.636	7.370
1.6	0.018	0.017	18.0	10.320	9.250
2.0	0.029	0.027	20.0	12.840	12.430
2.5	0.058	0.051	22.0	15.220	14.670
3.0	0.078	0.075	24.0	22.590	20.840
3.5	0.108	0.104	27.0	28.670	25.540
4.0	0.143	0.135	30.0	38.300	34.790
5.0	0.330	0.310	36.0	68.800	64.090
6.0	0.786	0.760	42.0	-	82.240
8.0	1.524	1.420	48.0	-	168.540
10.0	2.112	2.010

To determine the mass of washers made of other materials, the mass values given in the table are multiplied by the coefficients:

0.356 — for aluminium alloy; 0.970 — for bronze; 1.080 — for brass.

Compliant with DIN 433 and ISO 7092.