Pre-drilling recommended near board ends to prevent splitting

1 3/8-6 x 5 1/2 Socket Cap Screw Alloy

1/2 x 6 High Speed Aircraft Bit

#17 x 6 High Speed Aircraft Bit Cobalt

Made in Germany

1/2-13 x 2 1/4 Grade 5 Hex Cap Screw Plain Domestic USA (225) 3/4-10 A307 Grade A Carriage Bolts Hot Dipped Galvanized Pre-drilling recommended near board ends1 2 13 x 2 1 4 Grade 5 Hex Cap Screw Plain Domestic USA (225). 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