Thorlabs CP31/M blank 30mm cage plate, 0.35" thick screw size
M4 · 41 mm long
Our records put Thorlabs CP31/M blank 30mm cage plate, 0.35" thick on M4 screws, 41 mm long.
Where it is used: M4 tap, total length 41mm.
This entry is marked confirmed and comes from 3doptix.com.
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.
Thorlabs CP31/M blank 30mm cage plate, 0.35" thick 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 | 41 mm | 0.7 mm | not stated | not stated | M4 tap, total length 41mm | Confirmed |
Fitment records and sources
M4 tap, total length 41mm
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
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 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.
- The record states 41 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- 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
- JCM bill-acceptor manual warns that if the host cabinet mounting bracket is only 2mm thick, standard-length M4 screws will not seat correctly — screw length must be matched to bracket thickness.
- Camera rig/cage accessories (SmallRig, Wooden Camera/Metabones) frequently mix M4 structural screws with 1/4-20 and 3/8-16 imperial mounting points on the same product — verify which specific fastener a manual is referencing before ordering replacements.
More in Medical & Laboratory
Agilent 1100 LC/MSD mass spectrometerAgilent 8453 UV-Visible spectrophotometerAlaris 8110/8120 infusion pumpBehind-the-ear hearing aid shellBelmont Eurus S6 Dental UnitBHI Implants Rosen screwBicycle SPD-SL / SPD cleat fixing boltsBien-Air Dental HandpiecesBioHorizons CONELOG Dental ImplantsBlind-tapped DN16CF ConFlat vacuum flange (metric)BMC RESmart CPAP machineBredent dental prosthetic screw
Browse all 92 in Medical & Laboratory →The same screw also fits
Devices whose records share a thread with Thorlabs CP31/M blank 30mm cage plate, 0.35" thick, closest length match first.
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M4 × 41 mm
- Kolm Engines EZ77V4 model aircraft engine also M4 × 41 mm
- Wurth Elektronik WA-SSTIE steel spacer stud also M4 × 41 mm
- Bien-Air Dental Handpieces also M4
- Ottobock 17AD1 multifunctional ankle joint screw also M4
- SISAB ECO.50+/T laboratory centrifuge also M4
- Agilent 1100 LC/MSD mass spectrometer also M4
- Waters Xevo / Acquity instrument panel screw also M4
Questions about Thorlabs CP31/M blank 30mm cage plate, 0.35" thick screws
- What size screw does Thorlabs CP31/M blank 30mm cage plate, 0.35" thick use?
- M4 × 41 mm for M4 tap, total length 41mm.
- How long are the screws in Thorlabs CP31/M blank 30mm cage plate, 0.35" thick?
- The record gives 41 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Thorlabs CP31/M blank 30mm cage plate, 0.35" thick?
- 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.