How long are the screws in Renishaw CMM stylus (TP2, TP20, TP200 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 M2 screw?

0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.

What screwdriver do I need for Renishaw CMM stylus (TP2, TP20, TP200 probes)?

The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.

Can I use an imperial screw instead of M2?

No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.

Renishaw CMM stylus (TP2, TP20, TP200 probes) screw size

M2 · length not stated in the sources

The screws used on Renishaw CMM stylus (TP2, TP20, TP200 probes) are M2. None of the sources we found gives an exact length, so measure the original before you order.

The record covers technical spec document defines an 'M2 threaded stylus range' for use with industry-standard touch-trigger probes.

This entry is marked confirmed and comes from fortesolution.sg.

An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.

Renishaw CMM stylus (TP2, TP20, TP200 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
M2	not stated	0.4 mm	not stated	not stated	Technical spec document defines an 'M2 threaded stylus range' for use with industry-standard touch-trigger probes	Confirmed

Fitment records and sources

M2varies by stylus modelconfirmed

Technical spec document defines an 'M2 threaded stylus range' for use with industry-standard touch-trigger probes

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

Source

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 M2 screw measures about 2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.4 mm from one thread crest to the next (25 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 M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 M2 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M2

M2 CMM stylus threads are a de facto industry standard (Renishaw-originated) rather than a formal ISO CMM spec; do not confuse with M2 electronics screws which have different head/length conventions.
M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.

Pitch gauge · Screw size finder · Torque guide

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The same screw also fits

Devices whose records share a thread with Renishaw CMM stylus (TP2, TP20, TP200 probes), closest length match first.

M.2 (NGFF) SSD module retention also M2
DIN 912 socket-head cap screw also M2
DIN 965 / ISO 7046 countersunk Phillips screw also M2
Generic pan head screw (DIN 7985 / ISO 7045) also M2
PW-Sat2 CubeSat deployment switch also M2
Medtronic 670G insulin pump battery door/case screws also M2
Micro servo horn/arm screw also M2
Acer Aspire 3810TZ also M2

Questions about Renishaw CMM stylus (TP2, TP20, TP200 probes) screws

What size screw does Renishaw CMM stylus (TP2, TP20, TP200 probes) use?: M2 for technical spec document defines an 'M2 threaded stylus range' for use with industry-standard touch-trigger probes.
How long are the screws in Renishaw CMM stylus (TP2, TP20, TP200 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 M2 screw?: 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
What screwdriver do I need for Renishaw CMM stylus (TP2, TP20, TP200 probes)?: The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
Can I use an imperial screw instead of M2?: No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.

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