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) · custom metric thread adapters (mixed-pitch, double-male) · BSP to NPT adapters · hydraulic adapters (JIC/ORFS/SAE) · precision machined fittings · flange adapters · motor adapter rings & plates (mount a new motor to an old pump/gearbox) · stainless steel connectors. By application: plumbing adapters · sensor adapters · pressure gauge thread adapters (M20×1.5/M14×1.5 ↔ G/ZG/NPT) · tri-clamp adapters (sanitary ferrule ↔ thread/barb/flange) · hose barb adapters (metric threads, odd hose IDs) · automotive fuel-line adapters · motorcycle adapters. By form: male-to-male (double-male) · female-to-male & hex reducing bushings · metric to imperial (UNC/UNF/BSP/NPT). Guides: connect two different threads · connect different thread pitches (coarse vs fine) · thread adapter types (male-female, double-male, female-female). By size: M30 to M24 (incl. mixed-pitch M30×3.5→M24×2) · M24 to M20 · M20 to M16 · M16 to M12 · M12 to M10 · the full metric size table · large threads M33–M52 (coarse & fine pitch) · large metric to NPT M50–M100 (cable-gland ↔ conduit conversions to 4" NPT) · 13/16-28 UN to M20×1.5 (IP67 connector ↔ cable-gland threads, 304 stainless). Need a combination not listed? Tell us the two ends and we'll quote the adapter that joins them.
Where Our Adapters & Fittings Are Used
One custom fitting, many systems. We machine thread adapters and fittings for engineers and procurement across six application areas — any thread (BSP, NPT, metric, UNF, JIC), any material, from a single piece to bulk:
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 |
Technical Capabilities at a Glance
For engineers and procurement scoping a custom adapter or precision machined fitting — the standards, materials and tolerances we machine to:
| Thread Standards & Types | Machinable Materials | Precision & Custom Capability |
|---|---|---|
| NPT / NPTF (tapered pipe) Metric M (ISO coarse & fine) BSPP / BSPT (G & R) UNF / UNC (unified) JIC / ORFS / SAE JIS standard threads |
Stainless: 304, 316, 316L Brass / copper: C36000 & alloys Aluminium: 6061-T6, 7075 Titanium alloys Plastics: PEEK, PTFE, POM |
Tolerances down to ±0.005 mm (±0.0002") Surface finish Ra 0.8 to Ra 0.4 Thread fit classes 2A/2B, 3A/3B Volume: low-volume / small batch, 1 to 10,000+ pcs |
Build Your Adapter Spec — Instant RFQ
Configure a non-standard adapter against our CNC capabilities below. It generates clean RFQ text you can copy, or send straight to our engineers — no account, no CAD file.
Custom Thread Adapter Spec Configurator
Define both interfaces, material and batch size. We reply with lead time and pricing within 24 hours.
Custom adapter configuration…
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.
// Qty & price
1 pc
Sample price
Confirm fit before a run
3–10
Unit price drops
Setup cost shared
10+
Best price
All tiers quoted upfront
- →No distributor — you pay the maker directly
- →CAD saved after first order — reorder anytime at lower unit price
support@ekinsun.ltd
EXPLORE
- → Thread Adapters
- → Custom Metric Thread Adapters
- → BSP to NPT Adapters
- → Hydraulic Adapters (JIC/ORFS)
- → Precision Machined Fittings
- → Plumbing Thread Adapters
- → Sensor Thread Adapters
- → Pressure Gauge Thread Adapters
- → Tri-Clamp Adapters
- → Hose Barb Adapters
- → Automotive Fuel-Line Adapters
- → Custom Fasteners
- → Custom Metal Parts
- → Replacement Parts
- → Parts From a Sample
- → Reverse Engineering
- → All Custom Parts