Introduce

Hex nut,Grade2,5,8,2H,2HM,7,7M,8M. Hex bolt,grade2,5,8. DIN931/933,Grade4.6,8.8,10.9
Studbolt,Grade B7,L7,4.6,8.8 ASTM A194 2H nut,ASTM A193 B7 stud are our advantage.