Square nut 1.Standard:DIN, BS, ANSI/ASME, ISO and non ... , 1/8''-3'' 3.Grade:6,8,10,12.9 Square nut1.standard:DIN(din557,din562), BS, ANSI/ASME, ISO, GB ... .9 grade:2,5,85.finish: zp(bluish, white, yellow), plain, black, HDG6.material: mild carbon steel (SAE1008, LY, ML08, Q235 ...