Russian standards PDF
Prevailing torque type all-metal hexagon nuts with flange. Accuracy classes A and B
Document status: Active
Pan head screws with type H or type Z cross recess. Product grade A
Document status: Active
Countersunk flat head screws (common head style) with type H or type Z cross recess. Product grade A. Part 1. Steel screws of property class 4.8
Document status: Active
Cross-recessed countersunk (flat) head tapping screws
Document status: Active