When the Adapter You Need Doesn't Exist
Catalogues cover the common adapters. The one you actually need is often the one no one stocks: an odd thread combination, a metric-to-imperial conversion, a fitting for a discontinued sensor or pump, or a connector that has to seal between two parts that were never meant to join. You already know what you need — you just can't buy it.
EKINSUN machines those. We make custom adapters and fittings to your spec, or copied from a sample, in the thread, size and material you need — single pieces through small production. No CAD file, no catalogue limits, and a quote within 24 hours.
Send Us Whatever You Have
You don't need a drawing — just enough for us to nail the two ends and the seal:
A sample
The old adapter or both parts it must join — we measure the threads & bore.
The two threads
Tell us each side (e.g. 1/4" NPT to M12×1.5) and we make the link.
A photo
Clear photos with one known dimension or a caliper in shot.
A sketch
A rough drawing with the sizes and angle you need.
A broken fitting
Cracked or stripped is fine — we recover the geometry.
Adapters & Fittings We Make
Thread Adapters & Conversions
Application Fittings
Special
Popular: thread adapters (BSP/NPT/metric) · hydraulic adapters. Need a combination not listed? Tell us the two ends and we'll quote the adapter that joins them.
Get the Threads & Seal Right
An adapter only works if both ends fit and it doesn't leak. We focus the precision there:
| Feature | How we hold it |
|---|---|
| Threads (both ends) | Gauged to BSP / NPT / metric / UNF / JIC / ORFS / SAE, or reproduced from the sample |
| Sealing faces & tapers | Machined to the matched seal type (taper, cone, O-ring boss, flat) |
| Bore & flow | Sized so the adapter doesn't choke the line |
| Material & pressure | Brass, 316 stainless or steel chosen for the fluid, pressure and environment |
No Drawing? We Reverse Engineer It
Send the parts or sizes
The old fitting, both mating parts, or the two thread specs to connect.
We measure & draw it
Threads, seals and bore captured; we rebuild the CAD for free. How it works →
Confirm, then machine
You approve the drawing, then we turn and inspect it. Copy from a sample →
Materials
Brass
The default for fuel, air, water and general fluid fittings — easy to seal, corrosion-resistant.
Ask about brass →Steel & aluminium
Carbon/alloy steel for high-pressure hydraulics; aluminium where weight matters.
4140 →What to Send Us
- The sample adapter, or both parts it must connect — or photos with one known dimension
- The thread on each end if you know it (e.g. 1/2" BSPP to 3/8" NPT)
- Fluid/medium, pressure and environment (so we pick the right material and seal)
- Quantity — one to prove the fit, or a batch
- Delivery country (we ship worldwide)
No CAD, no problem. Rebuilding the drawing is our job — free, confirmed with you before anything is cut. See how to order with no CAD file.
A note on branded parts. We make a compatible fitting to the original's form, fit and function from what you supply. We don't sell branded original products or imply affiliation with the original manufacturer.
Frequently Asked Questions
Yes — the main reason customers come to us. If the thread combination, size or material isn't a stock item, we machine it to your spec. Give us the two threads to connect (or a sample of each side) and we make the adapter that joins them.
Yes — conversion adapters between BSP (BSPP/BSPT), NPT/NPTF, metric, UNF/UNJF, JIC, ORFS and SAE, male or female, straight, elbow or tee, in your size and material.
Yes. Send the part — even worn or broken — and we measure the threads, bore, sealing faces and form, rebuild the drawing for free, confirm it, then machine. No drawing or part number needed.
Thread adapters, fuel, sensor, pipe and hydraulic adapters, air fittings, hose connectors, reducers, custom fittings and special connector components — straight, elbow, tee or cross, male or female.
Brass for general fluid and pneumatic use, 316 stainless for corrosion and marine, carbon/alloy steel for high pressure, and aluminium where weight matters — chosen for pressure, fluid and environment.
Low. Single pieces and prototypes as well as small to medium runs. Tell us how many you need and we quote accordingly.
We make a compatible fitting to the original's form, fit and function from the sample, drawing or photos you supply. We don't sell branded originals or imply affiliation with the original manufacturer.
Get an Adapter Quoted
Sample or the two threads — that's all we need. Engineers reply in 24h.