Need an M30 to M24 adapter — especially the awkward M30×3.5 to M24×2 combination that pairs a coarse thread with a fine one and exists in no catalog? We machine it to order in steel or stainless, and we've already built this exact part from a hand sketch. Get a quote →
We've made this exact adapter
This isn't a hypothetical listing. A customer sent us a hand drawing of an M30×3.5 to M24×2 adapter with a 50 mm hex — a thread combination no supplier stocks — and we turned it into a dimensioned drawing the same day and machined it, in both a male-female and a double-male version. The two builds below are the real thing:
Why this pair isn't on a shelf
M30×3.5 is the coarse default for M30; M24×2 is a fine pitch for M24 (the coarse M24 is ×3). Putting a coarse M30 on one end and a fine M24 on the other — in one body, with a hex to drive it — is not a standard pair, so no distributor carries it. It only exists when it's machined on purpose. That's where a custom adapter beats a catalog reducer: the stock part has to match a standard pairing; ours matches your two threads, whatever they are.
Pitch & material options
Each end is single-point turned to its own pitch and gauged with a thread ring or plug. Standard combinations plus non-standard pitches on request:
| Option | Choices | Notes |
|---|---|---|
| M30 end | M30×3.5 (coarse) · M30×2.0 · M30×1.5 (fine) | Male or female |
| M24 end | M24×3.0 (coarse) · M24×2.0 · M24×1.5 (fine) | Male or female |
| Form | Male-female · double-male stud · female-female | To suit your two parts |
| Body / drive | Hex (e.g. 50 mm across flats) or spanner flats | Sized to a standard wrench where possible |
| Material | Steel · alloy steel 42CrMo4 · stainless 304 / 316 | Plated or passivated |
| Bore | Solid · or through-bore for shaft / fluid | Your call |
Typical uses at this size
M30/M24 is a substantial thread, so this adapter usually does real mechanical work — joining shafts and tie-rods, adapting a large sensor or probe boss, reducing a tapped hole on a machine or press, extending a spindle or ram, or retrofitting equipment where the original thread is no longer available. For load-bearing joints we hold the thread class and concentricity; if it also has to seal, tell us the fluid and pressure and we add the right seal face.
Other size adapters we machine
Frequently asked
Is the M30×3.5 to M24×2 adapter a stock part?
No. M30×3.5 is coarse and M24×2 is fine — that pairing isn't a catalog product. We machine it to order, and we've already built this exact adapter in both male-female and double-male forms from a hand sketch. See the build →
Can you do other pitches?
Yes — M30×3.5, ×2.0 or ×1.5 on the M30 end, and M24×3.0, ×2.0 or ×1.5 on the M24 end, plus non-standard pitches. Each end is gauged so both sides thread cleanly. More on coarse vs fine pitch →
Male-female, double-male, or female-female?
All three, with a hex or flats to drive it. Tell us the gender of each side and what it threads into.
Material and minimum order?
Steel, alloy steel, or 304/316 stainless. MOQ one piece, no tooling cost, no CAD — a sketch or the two callouts is enough. We draw and confirm before machining.
Tell us your two threads. A sketch, a photo, or just the callouts (e.g. "M30×3.5 female → M24×2 male, 304 stainless"). Free drawing, quote in 24–48 hours. Get a quote →