... /10.9/12.9 4.case hardening:HRC38-HRC42 raw material40Cr,35CrMosize1/2''--1.1/4,M12--M36Colorblackgrade10.9/12 ... timeWithin 30-60 days after contract establishedWe can supply you with full kinds of fasteners, and ... we can also produce it according to your requirement. ... masonry bolts, roofing bolts.Nuts: spring nuts, T nuts, K nuts, rivet nuts, cage nuts, lock nuts, hex ...