5/16-18 x 4 Hex Cap Screw SS 18-8 (A2)
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5/16-18 x 4 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-treated lumber.
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All of our item images are accurate representative images of the product category, however, due to the limitless variations in thread patterns, finishes, and other variables that exist with fasteners, bits and cutting tools, they are representative images only.