8 x 2 1/2 Simpson Truss-Head Wood Screws - Square Drive 305 SS - Box (100)

5/8-11 x 10 A307 Grade A Carriage Bolt Zinc Plated

9/16-12 x 2 Socket Cap Screw Alloy

7/8-14 x 3 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (15)

1 1/2-6 x 2 x 4 A563 Grade A Hex Coupling Nut ZInc Plated 1 1/8-7 A307A Hex Bolts Plain Steel 8 x 2 1/2 Simpson1 1 2 6 x 2 x 4 A563 Grade A Hex Coupling Nut ZInc Plated . A double chamfered hex nut used to join to externally threaded parts of equal diameter and pitch, often two pieces of threaded rod. Manufactured from 1010 1018 equivalent steel. Hardness = Rockwell B68 C32 Tensile strength = 60,000 psi. minimum. Note there is no single standard for coupling nut dimensions. These values are offered as a guide; deviations from these specifications may occur.