... DIN, ASTM,JIS, AS,GB Brief Introduction of Factory Founded in 1983, DJSF is a specialized enterprise, including screws, spring pins ... gained many customers’trust and welcome. The products sell well in many countries and areas, such as America, Spain, Japan, ... ); Alloy carbon steel;stainless steel,etc.4.FinishPlain;black; zinc plated(Cr,3+);zinc plated(Cr,6+); hot dipped galvanized; dacromet;nickle ...