2-1/2"-8 UN x 37-1/8" Collar Studs

2-1/2"-8 UN × 37-1/8" collar studs with a 3-3/8" collar, fully machined from 3-1/2" ASTM A193 B7 round bar and shipped as a hot-shot order.

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 →