Silicon Bronze Hex Tap Bolts are similar to low carbon steel in hardness but offer high resistance to corrosive environments such as sea water

The Lipped Drop-In (DIAL) features a lip at the top of the anchor body that keeps the top of the anchor flush with the concrete

7/16-20 x 1 1/2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (600)

8 x 2 Square Flat Particle Board Screw w/ Nibs T17 Zinc Plated - Carton (3

1/4-28 x 1 1/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (1900) Premium SDS Plus Hammer Drill Bits Silicon Bronze Hex Tap Bolts1 4 28 x 1 1 4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (1900) . 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