Studs & Rods
Full thread studbolts, double end and tap-end studs, threaded rod, stay rods — plus heat exchanger and turbine studs machined to drawing.
Full Thread Studs (Studbolts)
Threaded rod inserted through the holes of mating flanges, paired with heavy hex nuts.
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Double End Studs
Manufactured in various lengths and diameters from #2 to 4" diameter.
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Tap-End Studs
A short interference-fit thread one end, nut thread the other.
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Threaded Rod
Continuous thread in stock lengths, cut to size.
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Collar Bolts
Studs with a machined collar, made to your drawing.
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Turbine Studs
Specialized fasteners for extreme temperature and vibration environments.
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Stay Rods
Frac pump stay rods, one-piece and two-piece, with their sleeves and nuts.
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Custom Studs
Special studs built to your drawing or sample.
View specifications →Choosing studs & rods.
Stud bolts are the standard fastener for flanged piping: a length of threaded bar with a heavy hex nut at each end, sized by ASME B16.5 and B16.47 for each flange class. Double-end and tap-end studs thread into a tapped hole on one side; heat exchanger and turbine studs are machined to OEM or TEMA drawings, often with reduced shanks and milled hexes.
Most studs we ship are A193 B7 with 2H nuts, but the same machines turn B7M, L7, B16, stainless, duplex and nickel-alloy studs. PTFE coating, API 6A wellhead bolting and full traceability are available on request.