Standard: GB/T5780-5786, ISO4014,4017,8676,8765, DIN931,933,960,961, ASMEB18.2.1,

JISB1180, AS1110

Grade: 4.8,  8.8, 10.9, 12.9

Size: M6-M100

Surface Treatment: Plain, Black, Galvanized with Zinc, HDG

Material: Carbon Steel, Alloy Steel