Russian standards PDF
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
Electric wheelchairs. Method of determination of obstacles climbing ability
Document status: Replaced by GOST R ISO 7176-10-2012