OpenFlexure Delta Stage v1.1.0 motor mounts screw size
M2.5 · 8 mm long
If you are replacing a screw on OpenFlexure Delta Stage v1.1.0 motor mounts, the thread is M2.5, 8 mm long.
It is listed for 8x M2.5x8mm screws secure the stepper motors.
This entry is marked confirmed and comes from build.openflexure.org.
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.
OpenFlexure Delta Stage v1.1.0 motor mounts 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 | 8 mm | 0.45 mm | not stated | not stated | 8x M2.5x8mm screws secure the stepper motors | Confirmed |
Fitment records and sources
8x M2.5x8mm screws secure the stepper motors
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Camera and optics hardware often uses short screws into thin threaded plates, so check engagement before tightening fully.
- 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 record states 8 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
- Projector optics and fan screws often step down to M2.5 while the outer covers use M3 - do not reuse cover screws inside the light engine.
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
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 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 -
25x M2.5 x 8mm Phillips Screws for Acer Nitro 5 LCD Hinge Assembly
$5.99 -
M2.5 x 8mm Black Wafer Head Screws for Lenovo ThinkPad X131e Chromebook Palmrest Replacement – 10-Pack Black
$4.99Choose size
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Browse all 278 in Cameras & Optics →The same screw also fits
Devices whose records share a thread with OpenFlexure Delta Stage v1.1.0 motor mounts, closest length match first.
- Raspberry Pi camera module mounts also M2.5 × 8 mm
- Tripod head quick-release plate lock also M2.5 × 8 mm
- Camera cages & rigs also M2.5 × 8 mm
- Microscope objective turret also M2.5 × 8 mm
- Acer Aspire 5534 also M2.5 × 8 mm
- Acer Aspire 7120 also M2.5 × 8 mm
- Acer Aspire 5535 also M2.5 × 8 mm
- Lenovo G780 also M2.5 × 8 mm
Questions about OpenFlexure Delta Stage v1.1.0 motor mounts screws
- What size screw does OpenFlexure Delta Stage v1.1.0 motor mounts use?
- M2.5 × 8 mm for 8x M2.5x8mm screws secure the stepper motors.
- How long are the screws in OpenFlexure Delta Stage v1.1.0 motor mounts?
- The record gives 8 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 OpenFlexure Delta Stage v1.1.0 motor mounts?
- 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 OpenFlexure Delta Stage v1.1.0 motor mounts?
- TechSpareWarehouse (our own store) lists M2.5 x 8mm, which matches the length in the records above.