... :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 ... are as following:Bolts: hex bolts, heavy hex bolts, hex flange bolts, carriage bolts, stud bolts, eye bolts, U bolts, masonry ... nuts, rivet nuts, cage nuts, lock nuts, hex nuts, hex flange nuts, wing nuts, weld nuts, square nuts, cap nuts.Washers ...