Washers GB/T7245 DIN137 DIN6797 DIN6798 DIN6798-A GB/T97
GB/T7245 Curved spring washers
DIN137 Wave washer
DIN6797 Toothed lock washers
DIN6798
DIN6798-A Serrated lock washers-external teeth
GB/T97 Serrated lock washers-internal teeth
Material: 65Mn,SK5,SK7,Stck6,T8,T10,50CrV,60Si2Mn,CK45,1040-1050
Surface treatment:black oxide finish ,phosphating,Galvanized processing,dacromet,Mechanical galvanizing (dark) processing