... 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 ... can also produce it according to your requirement. As a professional manufacturer, we promise to provide you the products with ... Screws: machine screws, self tapping screws, self drilling screws, set screws, hex socket head cap screws, wood screws.Rivet: solid rivet, blind ...