1-8 x 4 Hex Cap Screw SS 316 (A4)

3/4-10 x 12 Wedge Anchor Mech Galv (5)

304 and 305 series stainless steels so 18-8 is used at times to designate any and all of those alloy groups

5/16-18 x 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (400)

3/4-10 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) 1 1/8-7 Socket Cap Screws Alloy 1-8 x 4 Hex Cap3 4 10 x 2 3 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25) . Grade 5 Hex Cap Screws are manufactured in the USA from medium carbon steel. Our Grade 5 material meets or exceeds SAE J429 Grade 5 specifications. All products are manufactured with rolled threads. Typical hardness on diameters 1 4 to 1 inch is HRC 25 34. On diameters over 1 inch to 1 1 2 hardness will range from HRC 19 30. Tensile strength for diameters 1 4 to 1 inch is a minimum