1 3/4-5 x 9 Socket Cap Screw Alloy

5/8-11 x 9 Grade 5 Hex Cap Screw Zinc Plated

They are also acceptable for use in ACQ pressure-treated lumber

2-4 1/2 Grade 2 Finished Hex Nut Zinc Plated

1-8 x 6 Hex Cap Screw SS 18-8 (A2) 7/16-20 Hex Cap Screws 18-8 Stainless Steel 1 3/4-5 x 9 Socket1 8 x 6 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