size:m8-m36 materail:carbon steel,stainless steel the produce can according to your requires

1)standard:DIN,ANSI,GB

2)materail:carbon steel,stainless steel

3)surface:black,phosphated,zinc plated and so on

4)size:m8-m36

5)loading port:shanghai or ningbo china

6)delivery days:30 days

Internal teeth serrated lock washerers din6798