Hi-Low thread pattern creates higher pullout tolerances

3/8-16 x 5 Hex Tap Bolt Silicon Bronze

1 1/4-7 x 10 A307A Hex Bolt Hot Dipped Galvanized

The slots are for the insertion of a cotter pin to secure the nut when used with a drilled shank fastener

1/2 Heavy Duty Jobber Drill Bit

3/8-24 x 7/8 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (1000) 5/8-18 Hex Cap Screws 18-8 Stainless Steel Hi-Low thread pattern creates higher3 8 24 x 7 8 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (1000) . Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on