... bolt Description Standard:ANSI,ASTM,JIS,DINGrade:Class 4.8 / 5. ... nuts, screws,washers, anchors, rivets, pins and special fasteners made of low and medium carbon steel, alloy & stainless steel, ... ANSI, AS, BS, JIS, GB, ISO and other standard&non-standard specifications base on our customers’ special request and drawings.We ... fasteners."Whenever you need fasteners, contact us ” standard size stud bolt