Pioreactor Raspberry Pi HAT assembly screw size
M2.5 · 6 to 12 mm long
Our records put Pioreactor Raspberry Pi HAT assembly on M2.5 screws in lengths from 6 to 12 mm.
The record covers M2.5 12mm hex standoffs plus M2.5 10mm screws fastening HAT to Pi.
This entry is marked confirmed and comes from docs.pioreactor.com.
M2.5 means a 2.5 mm nominal diameter with a 0.45 mm thread pitch. 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.
Pioreactor Raspberry Pi HAT assembly 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 | 6–12 mm | 0.45 mm | not stated | not stated | M2.5 12mm hex standoffs plus M2.5 10mm screws fastening HAT to Pi | Confirmed |
Fitment records and sources
M2.5 12mm hex standoffs plus M2.5 10mm screws fastening HAT to Pi
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
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 M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- 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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The records span 6–12 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M2.5 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
- Commonly confused with imperial 4-40 screws in older medical equipment, but modern GE/Mindray devices explicitly list M2.5 metric threads.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
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.
-
M2.5 x 6mm Laptop Motherboard Replacement Screws Wafer Head 10-Pack Black
$4.99 -
10x M2.5 x 6mm Phillips Screws for Lenovo ThinkPad X131e Chromebook LCD Hinge
$4.99
-
M2.5 x 8mm Screws for Retevis RT27 Radio Belt Clip 10-Pack Black Phillips
$4.99 -
M2.5 x 8mm Screws for Raspberry Pi 5 Case and PoE HAT 10-Pack Black
$4.99 -
M2.5 x 10mm Phillips Wafer Head Screw for Turntable Cartridge Headshell Mount - Pack of 50 Black
$5.99 -
M2.5 x 10mm Phillips Wafer Head Screw for ASUS TUF Gaming A15/F15 Laptop Repair - Single Replacement Black
$0.10 each · min. 50
-
ASUS ROG Strix G15 G513R Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
$0.10Choose size
-
ASUS ROG Strix G17 G713 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
$0.10Choose size
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 Pioreactor Raspberry Pi HAT assembly, closest length match first.
- Lab balance leveling foot also M2.5 × 10–12 mm
- GE HealthCare anesthesia delivery machine also M2.5 × 6 mm
- Alaris 8110/8120 infusion pump also M2.5 × 12 mm
- HP 255 G6 also M2.5 × 11 mm
- Xbox Series X drive bay and PSU also M2.5 × 6–8 mm
- Dell Latitude C800 also M2.5 × 6 mm
- HP ProBook 4441s also M2.5 × 6 mm
- Lenovo Legion Y7000P-1060 also M2.5 × 7 mm
Questions about Pioreactor Raspberry Pi HAT assembly screws
- What size screw does Pioreactor Raspberry Pi HAT assembly use?
- M2.5 × 6–12 mm for M2.5 12mm hex standoffs plus M2.5 10mm screws fastening HAT to Pi.
- How long are the screws in Pioreactor Raspberry Pi HAT assembly?
- The records range from 6 to 12 mm depending on the position, so match each screw to its own hole.
- 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 Pioreactor Raspberry Pi HAT assembly?
- 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 Pioreactor Raspberry Pi HAT assembly?
- TechSpareWarehouse (our own store) lists M2.5 x 6mm, M2.5 x 8mm and M2.5 x 10mm, which match lengths in the records above.