Bambu Lab X1/P1 heatbed transport anchors screw size
M3 · 20 to 23 mm long
Our records put Bambu Lab X1/P1 heatbed transport anchors on M3 screws in lengths from 20 to 23 mm.
Where it is used: heatbed anchor screws reported as M3-20 or M3-23.
This entry is marked reported and comes from forum.bambulab.com.
For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Bambu Lab X1/P1 heatbed transport anchors 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 | 20–23 mm | 0.5 mm | not stated | not stated | Heatbed anchor screws reported as M3-20 or M3-23 | Reported |
Fitment records and sources
Heatbed anchor screws reported as M3-20 or M3-23
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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.
- The records span 20–23 mm, which means different positions take different lengths — match each hole to its own screw.
- 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
- M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.
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Devices whose records share a thread with Bambu Lab X1/P1 heatbed transport anchors, closest length match first.
- InMoov open-source robot also M3 × 20 mm
- Ultimaker Original heated bed / Z-stage upgrade kit also M3 × 20–23 mm
- Prusa MK4 Nextruder also M3 × 20–23 mm
- Voron 2.4 3D printer also M3 × 20–23 mm
- FDM hotend and extruder mounts (general) also M3 × 20 mm
- Prusa MK3S extruder also M3 × 20–23 mm
- Prusa i3 MK3S/MK4 printed parts and extruder also M3 × 20–23 mm
- Voron 2.4 / Trident printed parts also M3 × 20–23 mm
Questions about Bambu Lab X1/P1 heatbed transport anchors screws
- What size screw does Bambu Lab X1/P1 heatbed transport anchors use?
- M3 × 20–23 mm for heatbed anchor screws reported as M3-20 or M3-23.
- How long are the screws in Bambu Lab X1/P1 heatbed transport anchors?
- The records range from 20 to 23 mm depending on the position, so match each screw to its own hole.
- 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 Bambu Lab X1/P1 heatbed transport anchors?
- 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.