These stainless steel cap nuts are composed of a hex nut and top cap consisting of 18% chromium and 8% nickel for corrosion resistance

1/2 x 3 Round Split Drive Anchor Zinc Plated (25)

25/64 Heavy Duty Drill Bit - Stubby Length

Web construction is heavier than general purpose construction making it particularly suitable for cotter pin hole drilling and cross hole drilling in head of bolts

tamper-proof

1-8 x 1 1/2 Hex Cap Screw SS 18-8 (A2) 9/16-18 Socket Cap Screws Alloy These stainless steel cap nuts1 8 x 1 1 2 Hex Cap Screw SS 18 8 (A2) . 18 8 stainless steel hex cap screws will have a typical composition of 18% chromium and 8% nickel. These percentages exist in 303, 304 and 305 series stainless steels so 18 8 is used at times to designate any and all of those alloy groups. 18 8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments. They are also acceptable for use in ACQ pressure