Bambu Lab X1 / P1 series printers screw size
M3 · length not stated in the sources
The screws used on Bambu Lab X1 / P1 series printers are M3. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for bambu Lab's official screw guide documents metric M-series machine screws as the standard fastener throughout their printers.
This entry is marked confirmed and comes from wiki.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 series printers 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 | Bambu Lab's official screw guide documents metric M-series machine screws as the standard fastener throughout their printers | Confirmed |
Fitment records and sources
Bambu Lab's official screw guide documents metric M-series machine screws as the standard fastener throughout their printers
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 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
- M3 is by far the most common metric fastener across lab, metrology, and cleanroom equipment, spanning coarse-thread ISO M3x0.5 in most cases.
- Some sewing-machine screws are labeled with metric-looking but slightly nonstandard sizes (e.g. M3.3) that are not true ISO M3 and are not interchangeable with standard M3 hardware.
More in 3D Printing, CNC & Robotics
The same screw also fits
Devices whose records share a thread with Bambu Lab X1 / P1 series printers, closest length match first.
- Prusa MK3S extruder also M3
- Bambu Lab AMS unit also M3
- MG996R servo mounting tabs also M3
- Creality Sprite Extruder Pro kit also M3
- RatRig V-Core 3.1 (300x300) also M3
- CR-10 Max heat-block cooling shroud also M3
- Sienci LongMill inductive sensor kit also M3
- Poppy Humanoid robot also M3
Questions about Bambu Lab X1 / P1 series printers screws
- What size screw does Bambu Lab X1 / P1 series printers use?
- M3 for bambu Lab's official screw guide documents metric M-series machine screws as the standard fastener throughout their printers.
- How long are the screws in Bambu Lab X1 / P1 series printers?
- 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 Bambu Lab X1 / P1 series printers?
- 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.