A2 Stainless Steel
Most common stainless steel A2(304). Offers excellent corrosion resistance for most applications. Widely available in metric and imperial
A4 Stainless Steel
Marine grade A4(316). Offers increased resistance to chloride corrosion compared to A2(304). Widely available in metric sizes and can be sourced in imperial threads
A4-80 Stainless Steel
The same as A4 but a higher grade. Only available in metric sizes.