... of high quality, the handcraft of high standard, the examination methods of high accuracy and the management of high level, DJSF ... ); Alloy carbon steel;stainless steel,etc.4.FinishPlain;black; zinc plated(Cr,3+);zinc plated(Cr,6+); hot dipped galvanized; dacromet;nickle ... -12.9: SAE GR.A-GR.85.FinishPlain;black; zinc plated(Cr,3+);zinc plated(Cr,6+); hot dipped galvanized; dacromet;nickle ...