5/8-18 L9 Hex Collar Locknuts Cadmium Yellow & Wax Coated Domestic USA (600)

5/8-11 x 1 1/4 Square Head Set Screw Cup Point 18-8 (A2) Stainless Steel

HeadLOK® offers higher design shear than 3/8" lag screws and no pre-drilling is needed

5/16-18 x 2 3/4 Grade 8 Hex Cap Screw Plain Domestic USA (550)

7/16-20 x 7/8 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) Stubby Drill Bits - Wire Gauge 5/8-18 L9 Hex Collar Locknuts7 16 20 x 7 8 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100) . 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