2-1/4" Studbolts & Heavy Hex Nuts

Large-diameter studbolt and heavy hex nut sets manufactured for an oil refinery turnaround — machined, certified and delivered to the outage schedule.

Studs are cut from certified bar, threaded by rolling or single-point cutting to the class called out, and chamfered and marked before they leave. Double-end and tap-end patterns, special lengths and drilled or coated variants are all made to the drawing.

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 →