Any Thread — To Spec, or Matched From Your Part
Most threads you can buy on a standard bolt or fitting. The ones that stop a job are the ones you can't: a non-standard pitch, a large diameter beyond tap and die sizes, an internal thread in an odd size, a left-hand or multi-start form, a legacy thread on old equipment, or a thread that has to match a part you already have. EKINSUN cuts those — to your specification, or measured and reproduced directly from your sample.
Threads are single-pointed on the lathe to the exact pitch, so we're never limited to what a catalogue tap or die can make. There's no tooling cost on a single-point thread, which is why one piece is as viable as a batch.
Don't know the thread spec? This is the most common reason people come to us. Send the part or the mating component — we gauge the major diameter, pitch and flank angle, tell you what it is, and cut it. See how we identify an unknown thread.
Threads We Cut
Metric (coarse & fine)
M2–M64 standard, plus fine and non-standard pitches cut to the measured value
UN / UNC / UNF / UNEF
Imperial unified threads, including UNEF extra-fine like 13/16-28 and 9/16-18
BSW / BSF / BA
British Whitworth, BSF and BA legacy threads (55° form) for vintage machinery
NPT / BSP / G
Tapered and parallel pipe threads for fittings and adapters
ACME / Trapezoidal / Square
Power-transmission threads for lead screws, jacks and clamps
Left-hand & multi-start
LH threads, and two- or three-start leads for fast travel
Large diameter
Beyond standard tap/die — single-pointed internal or external
Non-standard / unknown
Odd or intermediate pitches gauged from your sample and reproduced exactly
Technical Specifications
| Parameter | Capability |
|---|---|
| Thread location | External and internal (single-point, thread-mill, tap/die) |
| Standards | Metric, UN/UNC/UNF/UNEF, BSW/BSF/BA, NPT/BSP/G, ACME, Tr, square |
| Pitch | Standard, fine, intermediate and genuinely non-standard — cut to measured value |
| Diameter range | ~M2 up to Ø300mm; larger by single-point on request |
| Tolerance class | 6g/6H standard; tighter classes and custom fits on request |
| Special features | Thread relief / O-ring gap, sealing groove, wrench flats, partial thread |
| Materials | Steel, stainless, brass, bronze, aluminium, titanium, plastics |
| Minimum order | 1 piece — no tooling cost on single-point threads |
| Input accepted | Drawing, sketch, photo, or the sample / mating part — no CAD required |
How We Cut Threads
- Single-point lathe threading — a single tool traces the helix to the exact pitch; the way we cut non-standard, large and unknown threads, internal or external.
- Thread milling — for internal threads in tough material, blind holes and larger bores.
- Tapping & dies — fast and economical for standard sizes in quantity.
Custom Thread Parts — Where to Go Next
Thread machining sits behind most of what we make. If your job is a specific kind of threaded part, these pages go straight to it:
Thread Adapters
Convert one thread to another — BSP↔NPT↔metric, sealing fittings, reducers.
Thread adapters →Double-Ended Studs
A different thread on each end — e.g. M30×3.5 to M24×2 — with a hex to tighten.
Double-ended studs →Non-Standard Thread Bolts
Left-hand, Whitworth, BSF, BA, ACME and odd-pitch thread forms.
Non-standard threads →Bolts From a Sample
Match the thread on a worn or obsolete fastener — no part number needed.
From a sample →What Buyers Ask Us — in Their Own Words
The thread is unknown
"I've got the part but I don't know the thread — not sure how to measure it."
Send it. We gauge the diameter, pitch and flank angle, tell you exactly what it is, and cut a matching part. No spec, no drawing, no part number required.
Two different threads on one part
"One side M30×3.5, the other M24×2 — and a flat to tighten it."
We cut each end to its own thread and pitch in the same part, and mill a hex or wrench flats so it can be torqued. See double-ended studs.
A thread plus a feature
"Threads are correct — can you leave a 2.5 mm gap in the thread for an O-ring, and a groove 8 mm wide?"
Yes. We cut the thread, leave a relief gap where the O-ring sits, and machine the groove to size — and we'll advise the right groove width for your O-ring if you're not sure.
The thread is stripped or obsolete
"The thread's stripped and the part isn't made anymore."
We re-cut the thread, or machine a new part from the old one. Common on legacy machinery — see non-standard & legacy threads and reverse engineering.
Searches That Bring Buyers Here
Frequently Asked Questions
Yes. Send the part or its mating component and we gauge the major diameter, pitch and flank angle to identify the thread — metric, UN/UNF, BSW/BSF, BA, NPT/BSP or a non-standard pitch. If it's a known standard we name it; if not, we measure the exact pitch and cut it.
Yes. We single-point the thread on the lathe to the measured or specified pitch, so we're not limited to listed standards. Custom, intermediate and genuinely non-standard pitches, fine metric and legacy forms are all cut to the exact value.
Both. External threads are single-pointed or die-cut; internal threads are single-pointed, thread-milled or tapped depending on size and depth — including blind, through, and large internal threads beyond standard tap sizes.
Yes. Large-diameter threads beyond tap and die sizes are single-pointed on the lathe. ACME, trapezoidal (Tr), square and stub-ACME power-transmission threads are cut to standard or custom specification.
Yes. We thread, re-thread or add features to a part you send: cut a new thread, leave a relief gap in the thread for an O-ring, machine a sealing groove, or add wrench flats. Send the part, or a sketch with the dimensions.
MOQ 1, and no CAD required. A dimensioned sketch, a sample or the mating part is enough — we build the drawing for free and confirm before cutting. Single-point threads carry no tooling cost, so one piece is fully viable.
Get a Threading Quote
Spec, sketch or sample — all accepted. 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
- →Not sure of the thread? Send the part — we identify it
Or email: [email protected]