1/2-13 x 3 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (25)

5/8-11 x 2 1/4 Grade 8 Hex Cap Screw Plain Domestic USA (150)

nylon will begin to deteriorate at temperatures of 150°-350°F so they are not recommended for high temperature service

5/8-11 x 1 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (175)

5/8-18 x 3 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (25)

1/4-20 x 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (3300) 1/2-13 Hex Tap Bolts 18-8 Stainless Steel 1/2-13 x 3 1/2 Grade1 4 20 x 1 2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (3300) . 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