All hex cap screws are tested to meet ASTM F606 standards for hardness

5/8-11 x 2 1/2 Hex Tap Bolt Silicon Bronze

#27 x 6 High Speed Aircraft Bit Cobalt

the threads and nylon form a tight

5/16-18 x 2 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (550)

1 1/4-7 x 3 1/2 A307A Hex Bolt Hot Dipped Galvanized M24-3.00 Socket Cap Screws 12.9 Alloy Plain DIN 912 All hex cap screws are1 1 4 7 x 3 1 2 A307A Hex Bolt Hot Dipped Galvanized. A307A Hex Bolts are manufactured from low carbon steel, typically 1015 1022. Our A307A bolting meets or exceeds ASTM A307 Grade A. Material is manufactured with rolled threads. Zinc plated material meets or exceeds ASTM F1941. Tensile strength will meet or exceed 60,000 psi.