Prosthetic pyramid adapter screw size
M4 · 10 to 20 mm long
Our records put Prosthetic pyramid adapter on M4 screws in lengths from 10 to 20 mm.
The record covers alignment pyramid adapters use socket screws for adjustment.
This entry is marked reported.
An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Prosthetic pyramid adapter 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 | 10–20 mm | 0.7 mm | not stated | not stated | Alignment pyramid adapters use socket screws for adjustment | Reported |
Fitment records and sources
Alignment pyramid adapters use socket screws for adjustment
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 records span 10–20 mm, which means different positions take different lengths — match each hole to its own screw.
- 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.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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Devices whose records share a thread with Prosthetic pyramid adapter, closest length match first.
- Belmont Eurus S6 Dental Unit also M4 × 20 mm
- Kendro / Sorvall Legend T and Multifuge 3S/3L centrifuge also M4 × 10–12 mm
- cab XD4T industrial label printer also M4 × 10 mm
- TSC MH241 industrial label printer also M4 × 10–15 mm
- Medfusion 3500 syringe infusion pump also M4 × 12 mm
- Waters Xevo / Acquity instrument panel screw also M4 × 10 mm
- Agilent 1100 LC/MSD mass spectrometer also M4 × 16 mm
- Dell U2717D also M4 × 10 mm
Questions about Prosthetic pyramid adapter screws
- What size screw does Prosthetic pyramid adapter use?
- M4 × 10–20 mm for alignment pyramid adapters use socket screws for adjustment.
- How long are the screws in Prosthetic pyramid adapter?
- The records range from 10 to 20 mm depending on the position, so match each screw to its own hole.
- 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 Prosthetic pyramid adapter?
- 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.