5/8-18 x 6 Grade 5 Hex Cap Screw Zinc Plated Domestic USA (25)

7/8-9 x 3 Grade 8 Hex Cap Screw Plain Domestic USA (15)

1/4-20 x 4 1/2 Grade 5 Hex Cap Screw Plain Domestic USA (450)

1-8 x 6 1/2 Hex Cap Screw SS 18-8 (A2)

7/8-14 x 5 Hex Cap Screw SS 18-8 (A2)

1 1/8-7 x 1 1/2 x 3 A563 Grade A Hex Coupling Nut ZInc Plated 5/8-11 Socket Cap Screws 18-8 Stainless Steel 5/8-18 x 6 Grade 51 1 8 7 x 1 1 2 x 3 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.