Zinc plated material will meet or exceed ASTM F1941

5/8-11 x 32 A307A Hex Bolt Plain Steel

thus eliminating the need for pre-prepared holes

3/8-16 x 2 1/2 Grade 8 Hex Cap Screw Plain Domestic USA (100)

quenched and tempered

5/16-18 x 1 Socket Head Cap Screws Thermal Black Oxide Alloy Steel Domestic USA - Package (100) Strong-Point Phillips Drive Trim Head Self Drilling Screw Phosphate Coating Zinc plated material will meet5 16 18 x 1 Socket Head Cap Screws Thermal Black Oxide Alloy Steel Domestic USA Package (100) Socket Cap Screws with Thermal Black Oxide finish are made in the USA from durable alloy steel for superior strength and reliability. Featuring a hex drive and corrosion resistant coating, ideal for high performance and structural applications.