... price 4 produce to your request bolts and nuts1) Material:SS304,SS316,copper, brass, bronze, carbon steel 2) Grade: 4.8,6.8,8.8,10 ... .9,A2,A4 3) STD: JIS, BS, DIN, AISI....Description:hardware bolts and nutsScrews and Fasteners Brand ... fasteners (GB, DIN, ANSI,JIS AND ) and non-standard.GradeClass 4.8, Class 6.8, Class 8.8, Class 10.9, Class 12.9SurfaceBlack ...