Custom M12 to M10 Thread Adapter — Fine Pitch & Material to Order

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 →

Small part, but fine pitch is where it gets specific

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.

Pitch & material options

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

Typical uses

Other size adapters we machine

Where the M12 to M10 Catalogue Stops

A plain M12×1.75 to M10×1.5 reducing bush is a stock item in most fastener catalogues and you should just buy it. These are the versions that are not.

What you need	In the catalogue?	How we machine it
M12×1.75 × M10×1.5, plain steel	Stocked	Standard coarse-to-coarse reducing bush. Buy it off the shelf — it will be cheaper than anything we turn.
M12×1.25 × M10×1.0 — fine on both ends	No	Fine-pitch pairs are where the stock list ends. Both ends single-point cut.
M12×1.5 × M10×1.25 — mixed fine pitches	No	The commonest sensor and instrument combination, and the commonest reason this part gets machined.
Polished brass, for a visible lamp or fitting	Rare	Stock bushes are plated steel. Brass turned and polished, with a knurl if it is hand-tightened.
Through-bored for lamp pipe, cable or a rod	No	A solid reducing bush cannot be bored after plating. We bore it as part of the turning.
Cut to a specific length	No	Catalogue bushes come in one length. State the length you need.
Titanium or 316 stainless	No	Open at this size — the part is small enough that material barely moves the price.
Double-male M12 × M10 stud	Thin	Male-male is a stud rather than a bush; far fewer are stocked.
Left-hand thread on either end	No	Not stocked in any size. Cut like any other pitch.
Knurled body for hand-tight assembly	No	Knurl form and depth to suit finger grip, not a wrench.

The pitch options above are the ones listed on this page. If your part uses M12×1.0 or M10×0.75, say so and we cut that.

Frequently asked

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 for M12 to M10 — 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.