Need an M12 to M10 adapter in a specific fine pitch — M12×1.25 or M12×1.0 to M10×1.0 — or in stainless, brass or titanium, that the bulk reducing nuts don't offer? We machine it to order, even at one piece. From a sketch, no CAD. Get a quote →
At M12/M10 there are plenty of cheap brass reducing nuts for lamps and DIY. They come in one or two coarse pitches and one material. The moment you need a particular fine pitch — common on automotive and instrument threads — or a specific material, length or tolerance, the bulk part doesn't exist. That's where machining one to order wins: each end is single-point turned to the exact pitch you specify and gauged, in whatever metal the job calls for.
Coarse or fine? M12 coarse is ×1.75 and M10 coarse is ×1.5, but automotive, optical and instrument parts often use fines like M12×1.25, M12×1.0 and M10×1.0. Tell us the exact pitch on each side — getting it wrong is why a "right size" reducer still won't thread. More on coarse vs fine →
| Option | Choices | Notes |
|---|---|---|
| M12 end | M12×1.75 (coarse) · M12×1.5 · M12×1.25 · M12×1.0 (fine) | Male or female |
| M10 end | M10×1.5 (coarse) · M10×1.25 · M10×1.0 (fine) | Male or female |
| Form | Male-female · reducing insert · double-male · female-female | To suit the job |
| Material | Steel · stainless 304 / 316 · brass · titanium | Open — small part, no tooling cost |
| Drive / finish | Hex · spanner flats · knurl · polished brass | For lighting and visible work |
| Length / bore | To your length · solid or through-bored | Lamp pipe, cable or rod |
Fine-pitch sensor, mirror, linkage and gauge threads that step M12 to M10.
Brass M12-to-M10 adapters and hollow nipples for fixtures and restoration.
Small precise thread conversions on mounts, arms and accessories.
Standoffs, eye fittings and jig parts where the two threads differ.
Can you make an M12 to M10 adapter in a fine pitch?
Yes — fine pitch is exactly where custom pays off. M12×1.25 or ×1.0 and M10×1.25 or ×1.0, as well as coarse M12×1.75 / M10×1.5. Each end is cut to its exact pitch and gauged.
Cheap reducing nuts exist — why machine one?
For a light lamp or DIY job a brass nut is fine. You machine one when you need a specific fine pitch, a particular material, a longer or shorter body, a hex, or a tolerance the bulk parts don't hold — or when the combination simply isn't sold.
What materials can you make it in?
Steel, 304/316 stainless, brass for lighting and decorative work, or titanium for light weight. Small parts turn quickly, so material choice is open with no tooling cost. See custom fasteners →
Do you make small quantities?
Yes — MOQ one piece, plus small and medium batches, and we keep your drawing for re-orders. No CAD needed; a sketch or the two callouts is enough.
Tell us your two threads. A sketch, a photo, or the callouts (e.g. "M12×1.25 male → M10×1.0 female, brass, 25 mm long"). Free drawing, quote in 24–48 hours. Get a quote →
Your fine pitch and material, one piece up. Free drawing, quote in 24–48 hours.