- MaterialHigh-strength steel
analog - GOST 7798-70, 15589-70, ISO 4014-88, DIN 931 a partial carving and DIN 933 a full carving
Durability class: 10,9
Class of accuracy of bolts: And
Steel 40 brand
Carving step: large
Diameter (d) is from 16 to 24 mm.
Length (L) from 50 to 160 mm
Look: without covering, with an incomplete carving.