The RosMetiz Association has published standard STO PM 1-1.003-2011 relating to threading of Class 8 high grade nuts Fastener + Fixing reported.This standard defines the requirements for threading of nuts with internal diameters up to and including M16, of strength Class8, according to GOST P 52628-2006 “Screw nuts. Mechanical properties and test methods”, and also according to STO PM 1-1.001-2011 “Screw nuts six-sided with serrated bearing area: technical requirements”.(…)
