Stainless steel bolts have high strength, such as national standards and German standards A2-70 and A2-80, American standards A 193-B8 cl2 and A320-B8M cl2.

To process, manufacture, use and distribute American-made bolts and nuts, American-made bolts and nuts and American-made standard bolts and nuts, there must be American-made screw standards. You should buy a set of the latest American fastener standards, the eighth edition of IFI British fastener standards manual (published in English) (20 1 1). Experts will win, and those with standards will have relevant business.

I sell the eighth edition of IFI British fastener standard manual, the latest American fastener standard encyclopedia, as well as various fastener standards, books and materials, fastener training materials, etc. See Resources for more information.