spring lock washers standard:IFI L-19,ASTM SPRING LOCK WASHER,DIN 127 BSW SPRING LOCK WASHER,DIN7980,DIN9021 spring lock washers2)standard:IFI L-19,ASTM SPRING LOCK WASHER,DIN 127BSW SPRING LOCK WASHER,DIN7980,DIN90213)size:m3-m504)surface:plain, black5)material: stainless steel ,alloy steel,carbon steel6)package:bulk packing,small boxes,pocket. spring lock washers