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