Raspberry Pi HATs & cases screw size
M2 · 4 to 6 mm long
The screws used on Raspberry Pi HATs & cases are M2 in lengths from 4 to 6 mm.
The record covers some third-party HATs and lightweight covers use M2 (the four board holes are M2.5).
This entry is marked reported and comes from forum.flirc.tv.
M2 means a 2 mm nominal diameter with a 0.4 mm thread pitch. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
Raspberry Pi HATs & cases 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 | 4–6 mm | 0.4 mm | not stated | not stated | some third-party HATs and lightweight covers use M2 (the four board holes are M2.5) | Reported |
Fitment records and sources
some third-party HATs and lightweight covers use M2 (the four board holes are M2.5)
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 records span 4–6 mm, which means different positions take different lengths — match each hole to its own screw.
- 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 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.
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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M2 x 5mm Replacement Bottom Case Screws for Dell Inspiron 3535 Laptop 10-Pack
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M2 x 5mm Phillips Wafer Head Screw for Dell G16 7630 Gaming Laptop Repair - Pack of 100 Black
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M2 x 6mm Phillips Wafer Head Screw for Audiophile Headphone Headband Repair - Pack of 50 Black
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M2 x 6mm Phillips Wafer Head Screw for EDC Multi-Tool Handle Scale - Pack of 100 Black
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M2 x 6mm Phillips Wafer Head Screw for FPV Drone Build & Repair - Pack of 100 Black
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Devices whose records share a thread with Raspberry Pi HATs & cases, closest length match first.
- DJI Flame Wheel F450 / F550 also M2 × 4.5 mm
- Xbox wireless controllers also M2 × 6 mm
- M.2 heatsink / shield assemblies also M2 × 4–6 mm
- Kenwood TK-8302 / TK-2302 / TK-2306 transceivers also M2 × 5–6 mm
- Nintendo Switch also M2 × 4 mm
- Sony PMW-EX1R camcorder - chassis and covers also M2 × 4 mm
- Motorola MOTOTRBO XPR5350 / XPR5550 mobile radio also M2 × 6 mm
- PS5 DualSense controller also M2 × 4–6 mm
Questions about Raspberry Pi HATs & cases screws
- What size screw does Raspberry Pi HATs & cases use?
- M2 × 4–6 mm for some third-party HATs and lightweight covers use M2 (the four board holes are M2.5).
- How long are the screws in Raspberry Pi HATs & cases?
- The records range from 4 to 6 mm depending on the position, so match each screw to its own hole.
- 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 HATs & cases?
- 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.
- Where can I buy replacement screws for Raspberry Pi HATs & cases?
- TechSpareWarehouse (our own store) lists M2 x 4mm, M2 x 5mm and M2 x 6mm, which match lengths in the records above.