TimberLOK® screws are ACQ approved

13/32 x 18 High Speed Long Boy

7/8-9 x 2 1/2 Hex Cap Screw SS 316 (A4)

33/64 x 6 Reduced Shank Drill Bit (1/2 Shank)

1/4-20 x 3 1/2 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (50) Hex Washer Head Metal-Panel Screws 316 Stainless Steel TimberLOK® screws are ACQ approved1 4 20 x 3 1 2 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