Takachi RPI aluminium Raspberry Pi case screw size
M2.5 / M3 · 4 mm long
The screws used on Takachi RPI aluminium Raspberry Pi case are M2.5 and M3, 4 mm long.
There are 2 separate fitment records for it, including four pan head board-mounting screws (M2.5) and four flat head case-to-cover screws (M3).
Head and drive, as the sources state them: pan and flat / countersunk heads.
2 of the 2 records are marked confirmed, drawn from 1 source (takachi-enclosure.com).
An M2.5 screw is 2.5 mm in diameter with a 0.45 mm pitch, tapped with a 2.05 mm drill; imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.
Takachi RPI aluminium Raspberry Pi case 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 |
|---|---|---|---|---|---|---|
| M2.5 | 4 mm | 0.45 mm | Pan head | not stated | Four pan head board-mounting screws | Confirmed |
| M3 | 4 mm | 0.5 mm | Flat / countersunk | not stated | Four flat head case-to-cover screws | Confirmed |
Fitment records and sources
Four pan head board-mounting screws
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Four flat head case-to-cover screws
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 M2.5 screw measures about 2.5 mm with calipers (usually a hair under). This device also uses M3, so measure each screw rather than assuming they match.
- Pitch: 0.45 mm from one thread crest to the next (22.22 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
- The record states 4 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 M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 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 M2.5 is about 45-70 N·cm into metal threads and 20-35 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2.5 / M3
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
- Raspberry Pi holes are M2.5, not M3 — forcing M3 means reaming the hole and risking a cracked board.
- Museum/AV projector mounting kits typically bundle four to six thread sizes (M3–M6) in one bag to fit varied projector OEM patterns — always match the specific length/thread pair actually used for a given projector model rather than assuming all sizes apply universally.
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 Takachi RPI aluminium Raspberry Pi case, closest length match first.
- Dell Latitude 7330 Rugged Extreme also M2.5 × 4 mm
- Third-party Raspberry Pi cases & HAT stacks also M3 × 4 mm
- Hotends & heat breaks (E3D and clones) also M3 × 4 mm
- Acer Aspire / Swift also M2.5 × 4 mm
- Dell Latitude 5411 also M2.5 × 4 mm
- Dell Vostro 15 7500 also M2.5 × 4 mm
- Lenovo M490s also M3 × 4 mm
- Lenovo ThinkPad 770X also M2.5 × 4 mm
Questions about Takachi RPI aluminium Raspberry Pi case screws
- What size screw does Takachi RPI aluminium Raspberry Pi case use?
- M2.5 × 4 mm for four pan head board-mounting screws; M3 × 4 mm for four flat head case-to-cover screws.
- How long are the screws in Takachi RPI aluminium Raspberry Pi case?
- The record gives 4 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M2.5 screw?
- 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
- What screwdriver do I need for Takachi RPI aluminium Raspberry Pi case?
- The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.
- Can I use an imperial screw instead of M2.5?
- No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Takachi RPI aluminium Raspberry Pi case?
- TechSpareWarehouse (our own store) lists M2.5 x 4mm and M3 x 4mm, which match lengths in the records above.