... 4>Metrec tolerance:+/-0.01mm 5>ISO9001;ISO14001 Steel processing part1>Similar name:precision lathing part, ... precision machining part2>Material:brass,steel,iron,stainless steel,aluminium,alloy aluminium,copper,bronze3>Surface ... perfect management.The main production:self-clinching nuts,self-clinching standoffs,self-clinching studs, panel fasteners,insert of plastic nuts,welded nut, ...