Type:Variety of Bolts and nuts Material: High and Low Carbon Steel, Alloy Steel, Stainless, etc. Class: 4.8, 8.8, 10.9, 12.9 Surface: Zinc, Zinc Alloy, Nickel, Geomet, etc. Standard: JIS, AISI, DIN, and Automotive standard or non-standard, etc. Others: As requested