5"-8 UNJ and 3-3/4"-8 UNJ Custom Nuts

Custom 5"-8 UNJ and 3-3/4"-8 UNJ nuts manufactured from ASTM A193 Grade B7 to customer drawing for a critical application. The customer approved the first articles and accepted them for full-scale production.

Nuts are machined from bar or hex stock, tapped to the thread class specified, and heat treated where the grade requires it. Heavy hex, jam, castellated, cap, seal and coupling patterns are turned in-house, so special dimensions cost no more than standard ones.

About the material: The workhorse alloy-steel bolting grade for flanges, valves and pressure equipment — 125 ksi tensile, quenched and tempered 4140. Read the A193 B7 data page →