the expansion mechanism compresses and exerts force against the walls of the hole

3/4-10 x 1 Hex Cap Screw SS 18-8 (A2)

3/8-24 x 3 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (50)

Square drive prevents cam out and stripping

3/8-16 x 4 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (50) 5/8-11 Grade 8 Hex Cap Screws Yellow Zinc Plated the expansion mechanism compresses and3 8 16 x 4 1 2 Grade 5 Hex Cap Screw Plain Domestic USA (50). 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