... 2.size:1/2''-1.1/8'' & M12 -- M36 3.mechanical grade:8.8/10.9/12.9 4.case hardening:HRC38-HRC42 raw material40Cr,35CrMosize1/2''--1.1/4 ... bolts, stud bolts, eye bolts, U bolts, masonry bolts, roofing bolts.Nuts: spring nuts, T nuts, K nuts, rivet nuts ... .Rivet: solid rivet, blind rivet, pop rivet.Nails: roofing nails, twist nails, double head nails.Our company is the TOP SUPPLIER for Beijing 2008 ...