Hex Head Bolts

Hex Head Bbolts manufacturer & supplier in China, supply hex head bolts, class 4.8 / 8.8 / 10.9 and 12.9, size M4-M56, Length 25mm - 300mm .

Standard: DIN 933, DIN 931, ANSI/ASME B 18.2.1
Material: Steel ;
Grade: Class 4.8, class 8.8, class 10.9, class 12.9
Surface Treatment: Black oxide, Zinc plated, H.D.G
Size: M4 - M56 length upto 300mm