Raspberry Pi 5 board mounting holes screw size
M2 · 1.6 mm long
If you are replacing a screw on Raspberry Pi 5 board mounting holes, the thread is M2, 1.6 mm long.
Where it is used: official mechanical drawing shows 2.7 mm clearance holes for M2 fasteners.
This entry is marked confirmed and comes from pip.raspberrypi.com.
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Raspberry Pi 5 board mounting holes 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 | 1.6 mm | 0.4 mm | not stated | not stated | Official mechanical drawing shows 2.7 mm clearance holes for M2 fasteners | Confirmed |
Fitment records and sources
Official mechanical drawing shows 2.7 mm clearance holes for M2 fasteners
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
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.
- The record states 1.6 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 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
- Legacy Williams/Bally pinball fasteners are imperial (#5-40, #6-32); the M4 coil bracket is a modern Stern-era part.
- Packaging/labeling equipment manuals (e.g., cab print-and-apply applicators) mix M2 through M6 fasteners across a single machine for very different assemblies (sensors vs. frame vs. drive) — do not generalize one thread size to 'the machine' as a whole; cite the specific subassembly.
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Devices whose records share a thread with Raspberry Pi 5 board mounting holes, closest length match first.
- HP ProBook 650 G5 also M2 × 1.6 mm
- Dive watch bezel insert also M2 × 1.6 mm
- HP 15s-fq1000 also M2 × 1.6 mm
- Lenovo ThinkPad T14s Gen 7 also M2 × 1.6 mm
- HP 15s-fq4000 also M2 × 1.6 mm
- HP d5000"; all five pages checked, same PDF) also M2 × 1.6 mm
- HP ProBook 645 G4 also M2 × 1.6 mm
- Lenovo ThinkPad T14s Gen 6 Snapdragon also M2 × 1.6 mm
Questions about Raspberry Pi 5 board mounting holes screws
- What size screw does Raspberry Pi 5 board mounting holes use?
- M2 × 1.6 mm for official mechanical drawing shows 2.7 mm clearance holes for M2 fasteners.
- How long are the screws in Raspberry Pi 5 board mounting holes?
- The record gives 1.6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Raspberry Pi 5 board mounting holes?
- 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.