Zeiss XXT metrology arm knuckle element screw size
M3 · length not stated in the sources
Our records put Zeiss XXT metrology arm knuckle element on M3 screws. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: replacement lateral clamping screw listed as Clamping Screw, M3 XXT.
This entry is marked confirmed and comes from shop.metrology.zeiss.com.
An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Zeiss XXT metrology arm knuckle element 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 | Replacement lateral clamping screw listed as Clamping Screw, M3 XXT | Confirmed |
Fitment records and sources
Replacement lateral clamping screw listed as Clamping Screw, M3 XXT
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Keep material and finish the same as the original (often stainless) on equipment that is cleaned or sterilised.
- 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
- M3 is by far the most common metric fastener across lab, metrology, and cleanroom equipment, spanning coarse-thread ISO M3x0.5 in most cases.
- M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.
More in Medical & Laboratory
The same screw also fits
Devices whose records share a thread with Zeiss XXT metrology arm knuckle element, closest length match first.
- TSC MH241 / MH341 / MH641 industrial label printer also M3
- Bien-Air Dental Handpieces also M3
- Surgical / veterinary instrument handles also M3
- Thorlabs Fixed Mirror Mounts (post-mountable) also M3
- SISAB ECO.50+/T laboratory centrifuge also M3
- TSC TA200/TA300 barcode printer also M3
- Fresenius Medical Care 2008 Series hemodialysis machine also M3
- Agilent 1100 LC/MSD mass spectrometer also M3
Questions about Zeiss XXT metrology arm knuckle element screws
- What size screw does Zeiss XXT metrology arm knuckle element use?
- M3 for replacement lateral clamping screw listed as Clamping Screw, M3 XXT.
- How long are the screws in Zeiss XXT metrology arm knuckle element?
- 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 Zeiss XXT metrology arm knuckle element?
- 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.