Description

Washers in accordance with GOST 11371-78 – normal series of accuracy classes A and C for fasteners with thread diameters from 1 to 48 mm.

Description

GOST 11371-78 WASHER

Washers in accordance with GOST 11371-78 – normal series of accuracy classes A and C for fasteners with thread diameters from 1 to 48 mm.

Description of product design features

Washers should be made in 2 versions:

• performance 1 – accuracy class A and C;
• performance 2 – accuracy class A.

Material:

• carbon structural steels – St3, St3kp, 08, 08kp, 10, 10kp, 15, 20, 35, 45;
• alloyed structural steels – 40X, 30XGSA;
• high-alloy steels – 20X13, 12X18H10T
• brass – L63, L59-1, L63antimagnetic
• copper – M3
• aluminum alloy – AMg5, D1, AD1
• bronze – BrAMts9-2

Washer coating:

• cadmium;
• zinc;
• oxide chemical;
• chemical passivation;
• anodic oxide;
• nickel;
• silver;
• copper;
• phosphate

performed in our own electroplating shop.

The hardness of steel washers of accuracy class A must be at least 140HV, of accuracy class C – at least 100 HV.

Examples of the designation of a washer of execution of the 1st accuracy class A for a fastener with a thread diameter of 12 mm, with a thickness established in the standard, made of steel grade 08kp, with a zinc coating 6 microns thick chromated:

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Washer A.12.01.08kp.016 GOST 11371-78

The same, executions 2:

Washer 2.12.01.08kp.016 GOST 11371-78

Product applications

Washers have found their wide application in the automotive, construction, engineering and industrial sectors, as well as in many other areas. The washer is an indispensable part of many assemblies and mechanisms, especially if the latter experience vibration loads that contribute to the unwinding of threaded connections.