... (din934) HEXAGON HEAD SCREWS din9341.Standard:din931 \ din933 \ din 558 \ din6012.Grade:4.8,5.8,6.8,8 ... ,A4,35K,45#,40CR ETC, carbon steel ,stainless steel5.Finish surface:Zinc plated , Yellow Zinc plated , balck , plain 6. ... galvanization, and Dacromet. Our products are produced in conformity with DIN, ANSI, AS, BS, JIS, GB and ISO standards, ... you are welcomed to visit us. hex head bolt din 933