3.size:M2 to M6 according to buyer' need
2.Material :carbon steel,Low-carbon and mid-carbon steel
1.Surface finish:zinc plated, HDG, black,plain
We could manufacture kinds of washers with different materials and sides as to meeting customers' needs
internal washer (washer,o-ring,outernal washer)
Our production is in compliance with ISO, DIN, BS,ANSI and JIS standards or provide special fastening products made to customers