These are premium quality

5/16-18 x 7/8 Grade 5 Hex Cap Screw Plain Domestic USA (1500)

7/8-14 x 5 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (35)

Tensile strength (not pull out) will meet a minimum of 60

1/2-13 x 3 Hex Tap Bolt Silicon Bronze

5/8-18 x 2 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (25) 5/8-11 Socket Cap Screws 316 Stainless Steel These are premium quality5 8 18 x 2 3 4 Grade 5 Hex Cap Screw Plain 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 of