GOST 11371-78 and DIN 125 are standards for washers.
Flat washers according to DIN 125 and GOST 11371-78 are available in two versions. The first variant has a shape with smooth edges without a chamfer, the second variant has a chamfer on one side of the outer edge, made at an angle of 30° to 45° (DIN 125).
According to DIN 125, washers are manufactured only in accuracy class A, while according to GOST 11371-78, they are manufactured in accuracy classes A and C.
DIN 125 washers have a wider range of sizes and higher hardness than GOST 11371-78, which allows them to be used in critical structures in construction.
| Параметр | DIN 125 | ГОСТ 11371-78 |
| d - діаметр різьблення деталі кріплення, мм | від М1 до М90 | від М1 до М48 |
| h – товщина шайби, мм | від 0.3 до 12 | від 0.3 до 8 |
| d 2 – зовнішній діаметр шайби, мм | від 3 до 160 | від 3.5 до 92 |
| Клас точності | А | А и С |
| Твердість за Віккерсом, HV | від 300 до 400 | А ≥ 140 С ≥ 100 |