DROP-IN® anchors are internally threaded

3/8-16 x 5 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (175)

8 x 3 Square Bugle Decking Screws W

a new plating that is 7x more corrosion resistant than standard zinc plating

1/4 x 1 1/4 Phillips Flat Hi-Low Thread Concrete Screws Blue Ceramic Coated

1/2-13 x 2 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50) 6" Aircraft Bits - Fractional DROP-IN® anchors are internally threaded1 2 13 x 2 3 4 Grade 5 Hex Cap Screw Zinc Plated 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