M3 M4 M5 M6 M8 Set Screws Button Head Bolts With Nuts and Washers Stainless Steel. M4 M5 M6 M8 Set Screws button head flange Bolts With Nuts and Washers Stainless Steel. A2 stainless steel is commonly referred to as 18-8 since it contains 18% chromium and 8% nickel.
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