Antique wall clock pendulum brackets screw size
M2.5 · 5 to 10 mm long
Our records put Antique wall clock pendulum brackets on M2.5 screws in lengths from 5 to 10 mm.
The record covers pendulum bracket and movement mount screws in European clocks.
This entry is marked reported.
For reference, M2.5 is 2.5 mm across the threads at 0.45 mm pitch. The imperial size people confuse it with: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.
Antique wall clock pendulum brackets 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 | 5–10 mm | 0.45 mm | not stated | not stated | Pendulum bracket and movement mount screws in European clocks | Reported |
Fitment records and sources
Pendulum bracket and movement mount screws in European clocks
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Frame and motor screws must not reach the motor windings; check the length against the motor's mounting depth.
- 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 5–10 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
- 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.
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 Antique wall clock pendulum brackets, closest length match first.
- Holybro X500 V2 with Pixhawk 6C (PX4 official build) also M2.5 × 6 mm
- Axial SCX10 III RC crawler, countersunk and cap screws also M2.5 × 5–10 mm
- DJI OEM mounting screw (quad/hex arm hardware) also M2.5 × 5–7 mm
- Sewing machine needle plate also M2.5 × 5–10 mm
- PowerVision PowerRay underwater drone also M2.5 × 6–10 mm
- Hitec / Futaba servo horn retaining screw also M2.5 × 8 mm
- Raspberry Pi (Model B+ through Pi 4/Pi 5 form factor boards) also M2.5 × 6–10 mm
- Drone remote controller internals also M2.5 × 5–10 mm
Questions about Antique wall clock pendulum brackets screws
- What size screw does Antique wall clock pendulum brackets use?
- M2.5 × 5–10 mm for pendulum bracket and movement mount screws in European clocks.
- How long are the screws in Antique wall clock pendulum brackets?
- The records range from 5 to 10 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 Antique wall clock pendulum brackets?
- 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 Antique wall clock pendulum brackets?
- TechSpareWarehouse (our own store) lists M2.5 x 5mm, M2.5 x 6mm and M2.5 x 8mm, which match lengths in the records above.