Actobotics servo horn / hub screw size
M2 · 6 to 10 mm long
If you are replacing a screw on Actobotics servo horn / hub, the thread is M2 in lengths from 6 to 10 mm.
The record covers fixes a servo horn or hub to the bore.
This entry is marked reported and comes from servocity.com.
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Actobotics servo horn / hub 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 | 6–10 mm | 0.4 mm | not stated | not stated | fixes a servo horn or hub to the bore | Reported |
Fitment records and sources
fixes a servo horn or hub to the bore
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
How to check the screw before you buy
- Printer and CNC builds usually publish a bill of materials; when it lists a length, follow it, since extrusion T-nuts and motor faces have fixed thread depths.
- 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 6–10 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 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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Devices whose records share a thread with Actobotics servo horn / hub, closest length match first.
- NEMA 17 stepper motor (Novanta/IMS) also M2 × 6 mm
- Voron 2.4 also M2 × 10 mm
- Prusa i3 MK3S/MK4 (official fastener cheatsheet) also M2 × 8 mm
- HP ProBook 4410s also M2 × 6 mm
- HP ProBook 4411s also M2 × 6 mm
- Lenovo ThinkPad X22 also M2 × 6 mm
- HP ProBook 4416s also M2 × 6 mm
- HP Presario 2800 also M2 × 10 mm
Questions about Actobotics servo horn / hub screws
- What size screw does Actobotics servo horn / hub use?
- M2 × 6–10 mm for fixes a servo horn or hub to the bore.
- How long are the screws in Actobotics servo horn / hub?
- The records range from 6 to 10 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 Actobotics servo horn / hub?
- 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 Actobotics servo horn / hub?
- TechSpareWarehouse (our own store) lists M2 x 6mm and M2 x 8mm, which match lengths in the records above.