LeRobot SO-101 arm screw size
M3 · length not stated in the sources
LeRobot SO-101 arm takes M3 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers structural link and gripper assembly.
This entry is marked reported and comes from huggingface.co/docs/lerobot SO-101 documentation.
An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
LeRobot SO-101 arm 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 |
|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | not stated | structural link and gripper assembly | Reported |
Fitment records and sources
structural link and gripper assembly
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Source: huggingface.co/docs/lerobot SO-101 documentation
How to check the screw before you buy
- Into printed plastic, the screw either self-taps or needs a heat-set insert; machine screws straight into plastic strip easily.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 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.
- Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M3
- The bioprinter M3 reference is a tube-connector thread spec, not a structural chassis screw; verify before assuming interchangeability with fastener screws.
- Pond/aquarium equipment manuals aimed at consumers rarely specify exact thread pitch or length for internal fasteners, since these are considered non-user-serviceable; distributor-level assembly/service manuals (e.g., Maytronics internal documents) are a better source than end-user guides.
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Devices whose records share a thread with LeRobot SO-101 arm, closest length match first.
- LDO Voron 2.4 300/350 kit also M3
- Bambu Lab X1 / P1 / A1 frame and toolhead also M3
- Voron StealthBurner toolhead (stock hotend) also M3
- GT2 timing pulley grub screws also M3
- Bondtech 17-tooth steel gear also M3
- Voron 2.4 / Trident also M3
- Voron 2.4 gantry and carriage hardware also M3
- Heated bed to Y-carriage also M3
Questions about LeRobot SO-101 arm screws
- What size screw does LeRobot SO-101 arm use?
- M3 for structural link and gripper assembly.
- How long are the screws in LeRobot SO-101 arm?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- What is the thread pitch of an M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for LeRobot SO-101 arm?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.