Double Ended Stud

Double ended studs are the backbone of secure, serviceable assemblies where precision, strength, and repeatability matter. Our studs deliver reliable clamping force, clean alignment, and quick turnaround during maintenance so your equipment spends more time running and less time on the bench. Built for demanding flanged connections and heavy-duty setups, they’re engineered to hold fast and come apart cleanly when it’s time to service.

Precision Studs for Repeatable Performance

Our double ended studs feature threads on both ends to accept nuts while leaving a solid center section that keeps alignment true and service straightforward. This design helps you draw components together evenly, protect tapped holes from repeated wear, and reassemble with confidence after inspections or upgrades. 

Use our double ended studs anywhere you need solid clamping with predictable serviceability: pump and valve flanges, turbine housings, compressor covers, gearboxes, manifolds, or any critical interface that sees routine checks. Because nuts come off without disturbing the base threads, you preserve the life of your tapped components and keep rebuilds consistent from job to job.

If you’re completing a joint or fine-tuning stand-off spacing, pair our studs with the right hardware—our Hex Nut for standard clamping, our Acorn Nut for a clean, finished cap, or our Coupling Nut when you need to join threaded rods or reach deeper into an assembly—so every connection looks sharp and performs flawlessly.

DIN 939 Double Ended Studs

Our DIN 939 studs are threaded at both ends with an unthreaded center body that makes wrenching and alignment straightforward. They shine in flanged connections and in components that see frequent disassembly, helping you maintain consistent clamp load while protecting internal threads in the mating parts. When uptime is critical and tolerances are tight, this standard delivers repeatable fits you can trust.

Precision Fit and Performance

Crisp, concentric threads and consistent pitch ensure even load transfer across the joint so gaskets seat properly and flanges stay flat. The unthreaded mid-section on DIN 939 adds stability during assembly, reducing cross-thread risk and helping techs hit target torque with fewer passes. In practice, that means fewer surprises during pressure tests and a connection that stays tight through vibration, heat, and service intervals.

Installation and Serviceability

Set alignment, hand-start each end to protect the lead threads, and seat the stud so the engagement is balanced in the base material. With the unthreaded center, you can hold position while tightening without scarring threads, then bring the joint together smoothly to the specified torque. When service calls, removal is clean, hardware swaps are quick, and the base threads remain ready for the next cycle.

FAQs

What is a double-ended stud?

A double-ended stud is a fastener with threads on both ends and no head, designed to be installed into a tapped component on one side while accepting a nut on the other to clamp parts together. Our versions provide stable alignment, repeatable torque, and easier maintenance because you remove the nut rather than stressing the tapped hole every time you service the joint.

How many types of studs are there?

In practice, you’ll encounter several common types, including double-ended studs like ours, fully threaded studs used for extended clamping and adjustment, tap-end studs that feature different thread lengths or pitches for base and nut ends, and specialty variants specified by standards such as DIN 939 that include an unthreaded center for alignment and wrenching. 

How to install a double-ended stud?

Clean the threads, apply the appropriate lubricant or thread preparation specified for the joint, and hand-start the base end to avoid cross-threading. Drive the stud to the correct depth so the engagement is balanced and the unthreaded center, if present, sits where intended for wrenching or positioning. Align your parts, install the nut, and tighten to the specified torque in a proper pattern for the joint so load distributes evenly and the connection beds in without distortion.