When the Fastener Hasn't Been Sold in 40 Years
Restoring a vintage machine, engine or vehicle nearly always hits the same wall: a few fasteners that simply aren't made anymore. The thread is an old standard, the head shape is unusual, the length is odd — and every distributor says "obsolete". One missing bolt can hold up an entire rebuild.
EKINSUN reproduces those fasteners from the single original you still have. We identify the thread (including the old imperial standards), rebuild the geometry, and machine an exact match in the right material — so the restoration can carry on.
Send Us One Original
One sample
A single original fastener — we measure everything from it.
Even corroded
Rusted or partly stripped is fine; we restore to original intent.
Or a photo + size
If you can't post it, photos with one known dimension help.
The mating part
The nut or tapped hole it fits, if the bolt itself is gone.
Vintage & Legacy Threads We Cut
We gauge and reproduce the old standards that catalogue suppliers no longer stock:
| Family | Examples |
|---|---|
| British vintage | BSW (Whitworth), BSF, CEI / "Cycle", BSC, BA |
| Imperial | UNC, UNF, UNEF, 8-UN and odd TPI counts |
| Metric & non-standard | Standard metric, fine-pitch and unusual one-off pitches |
| Heads & drives | Square, hex, slotted, cheese, period-correct profiles |
Material and finish are matched to the job — mild and alloy steel, stainless, brass or bronze, with black oxide, zinc or a plain finish for period authenticity.
Not sure what thread it is? That's our job — send the part and we identify it for free with the quote. More on how we reverse engineer and match an unknown thread.
A note on branded parts. We make a compatible fastener to the original's form, fit and function from your sample. We don't sell branded originals or imply affiliation with the original manufacturer.
Frequently Asked Questions
Yes. Send one physical sample — even corroded — and we gauge the thread, head, drive and length, identify the standard, rebuild the drawing for free, then manufacture. No catalogue listing, part number or CAD file needed.
Yes — we identify and cut legacy threads (BSW/Whitworth, BSF, CEI, BSC, BA, UNC/UNF) by gauging pitch, diameter and form on your sample, and reproduce odd metric pitches too.
Yes — one sample is enough; we measure everything from it. If it's badly worn we restore the worn features to the original design intent rather than copying the damage.
Yes. No tooling cost on machined fasteners, so small restoration quantities — even a single matched set — are welcome, in the correct material and finish.
We make a compatible fastener to the original's form, fit and function from your sample. We don't sell branded originals or imply affiliation with the original manufacturer.
Reproduce an Obsolete Fastener
Send one original — we identify the thread free with your quote.