Steel – spring (galvanized zinc)
Stainless steel – A2-70

d*d1d2s
М33.260.4
М3.53.770.5
M44.380.5
M55.3100.6
М66.4110.7
M77.412.50.8
М88.4150.8
M1010.5180.9
М121320.51
M1415241
M1617261.2
M1819301.4
M2021331.4
M2223361.5
M2425381.5
M2728441.6
M3031481.6

Analogous to DIN 6797 A:

GOST 10463-81 – notched and notched lock washers with external teeth designed for fasteners with threads from 2 to 24 mm.