Renishaw CMM stylus (TP7M and related probes) screw size
M4 · length not stated in the sources
If you are replacing a screw on Renishaw CMM stylus (TP7M and related probes), the thread is M4. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for spec document defines an 'M4 threaded stylus range' optimized for stiffness/weight on high-accuracy TP7M probes.
This entry is marked confirmed and comes from fortesolution.sg.
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Renishaw CMM stylus (TP7M and related 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 |
|---|---|---|---|---|---|---|
| M4 | not stated | 0.7 mm | not stated | not stated | Spec document defines an 'M4 threaded stylus range' optimized for stiffness/weight on high-accuracy TP7M probes | Confirmed |
Fitment records and sources
Spec document defines an 'M4 threaded stylus range' optimized for stiffness/weight on high-accuracy TP7M probes
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
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 M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 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 M4 heads take PH2 for Phillips and T20 for Torx, and a 3 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 M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
More in Standards & References
The same screw also fits
Devices whose records share a thread with Renishaw CMM stylus (TP7M and related probes), closest length match first.
- Agilent (HP) 8453 UV-Visible Spectroscopy System also M4
- HBM VKK1-4A load cell junction box also M4
- DIN 912 socket-head cap screw also M4
- DIN 965 / ISO 7046 countersunk Phillips screw also M4
- Vulcan-Hart Chef combi oven 61E/101E also M4
- ECSS-E-HB-32-23A space threaded fastener handbook also M4
- Allen & Heath ZED mixer rack ear kit AP7956 also M4
- Celestron NexStar 8 eyepiece holder set screw also M4
Questions about Renishaw CMM stylus (TP7M and related probes) screws
- What size screw does Renishaw CMM stylus (TP7M and related probes) use?
- M4 for spec document defines an 'M4 threaded stylus range' optimized for stiffness/weight on high-accuracy TP7M probes.
- How long are the screws in Renishaw CMM stylus (TP7M and related 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 M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for Renishaw CMM stylus (TP7M and related probes)?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.