6-lobe drive prevents driver bit cam-out and stripping in recess

7/16-14 x 5 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25)

3/4-10 x 4 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (20)

7/8-9 x 12 Socket Cap Screw Alloy

7/16-20 x 1 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (500)

5/8-18 x 4 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (80) Square Pancake-Head Self Tapping Screw 410 Stainless Steel 6-lobe drive prevents driver bit5 8 18 x 4 1 2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (80) . 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