... 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 ... good price.Our products are as following:Bolts: hex bolts, heavy hex bolts, hex flange bolts, carriage bolts, stud bolts, eye ... screws, self tapping screws, self drilling screws, set screws, hex socket head cap screws, wood screws.Rivet: solid rivet, blind rivet ...