Standard: DIN931,933,960,961,912,7991,6914,6921,558,ISO4017,4014, IFIA-10(UNC,UNF),ASTM A325 

Size: M4-M64, 1/4'-2

Grade:4.8, 6.8, 8.8, 10.9, 12.9. 5,8,10.  

Material:Carbon steel,Alloy steel

Finish:Plain,Black,Z/P,Hdg.Dacromet

Original of Place: Ningbo, China