Designed for use with 18-8 stainless steel screws

1/2-13 x 8 Socket Cap Screw 18-8 (A2) Stainless Steel

5/16-18 x 1 3/4 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (100)

5/8-18 x 5 Grade 8 Hex Cap Screw Yellow Zinc Plated

9/16-18 x 5 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

1-8 x 1 1/4 x 2 1/2 A563 Grade A Hex Coupling Nut ZInc Plated 1 1/4-7 Socket Set Screws Cup Point Alloy Designed for use with 18-81 8 x 1 1 4 x 2 1 2 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.