Renishaw CMM stylus (TP1, TP6, SP25M probes) screw size
M3 · length not stated in the sources
The screws used on Renishaw CMM stylus (TP1, TP6, SP25M probes) are M3. None of the sources we found gives an exact length, so measure the original before you order.
The record covers spec document defines an 'M3 threaded stylus range' for manual CMM probes TP1/TP6 and scanning probe SP25M.
This entry is marked confirmed and comes from fortesolution.sg.
M3 means a 3 mm nominal diameter with a 0.5 mm thread pitch. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Renishaw CMM stylus (TP1, TP6, SP25M probes) screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | not stated | Spec document defines an 'M3 threaded stylus range' for manual CMM probes TP1/TP6 and scanning probe SP25M | Confirmed |
Fitment records and sources
Spec document defines an 'M3 threaded stylus range' for manual CMM probes TP1/TP6 and scanning probe SP25M
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Take one original screw out first and measure it before ordering; the record above tells you the thread, the original screw tells you the exact length and head.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M3
- Eurorack is a strong known case with two competing metric standards (M2.5 for Vector rails, M3 for Schroff/DIN-style and 3U threaded rails); mixing rail types requires matching screw/nut thread.
- Printer manuals often mix screw callouts like 'M3*8L' (length in mm after the L) with driver-bit-only references elsewhere in the same manual — only the explicit M-prefixed entries were captured here.
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Devices whose records share a thread with Renishaw CMM stylus (TP1, TP6, SP25M probes), closest length match first.
- DIN 965 / ISO 7046 countersunk Phillips screw also M3
- DIN 912 socket-head cap screw also M3
- CubeSat Kit solar panel clips and chassis also M3
- ARRI rosette accessory adapter also M3
- 2.5in SATA SSD / HDD also M3
- NBK cleanroom/semiconductor vented socket head cap screw (SVSHT-M3-SD) also M3
- Airsoft AEG Version 2 / EHPA gearbox shell also M3
- Generic hex socket button head screw (ISO 7380-1) also M3
Questions about Renishaw CMM stylus (TP1, TP6, SP25M probes) screws
- What size screw does Renishaw CMM stylus (TP1, TP6, SP25M probes) use?
- M3 for spec document defines an 'M3 threaded stylus range' for manual CMM probes TP1/TP6 and scanning probe SP25M.
- How long are the screws in Renishaw CMM stylus (TP1, TP6, SP25M probes)?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- What is the thread pitch of an M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for Renishaw CMM stylus (TP1, TP6, SP25M probes)?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.