Hex Lag Screw, Machine Screw, Hex Socket Cap Screw manufacturer / supplier in China, offering ASME/ANSI ASTM A194 Gr. 2h Heavy Hex Nut 1-3/4" Hex Nuts with HDG/Black/Yellow/White Zinc Plated, ASME/ANSI All Size Hex Nuts with HDG/Black/Yellow/White Zinc Plated (ASTM A563 / F594 / F467), DIN934 Hex Nut with Black/Yellow/White Zinc Plated M1 Grade4.8/8.8/10.9/12.9 and so on.