DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers screw size
M1.4 · 4 to 5 mm long
If you are replacing a screw on DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers, the thread is M1.4 in lengths from 4 to 5 mm.
The record covers tiny propeller retention screws, not interchangeable between models.
This entry is marked reported and comes from djioemparts.com.
An M1.4 screw is 1.4 mm in diameter with a 0.3 mm pitch, tapped with a 1.1 mm drill; imperial look-alike: #0-80 UNF (1.52 mm) — close in diameter, different pitch, do not mix.
DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers 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 |
|---|---|---|---|---|---|---|
| M1.4 | 4–5 mm | 0.3 mm | not stated | not stated | Tiny propeller retention screws, not interchangeable between models | Reported |
Fitment records and sources
Tiny propeller retention screws, not interchangeable between models
pitch 0.3 mm · tap 1.1 mm · clearance 1.6 mm · PH000 / PH00 / Torx T2–T3
How to check the screw before you buy
- Vibration loosens small screws on drones and RC models, so builders commonly add a drop of medium (blue) threadlocker on metal-to-metal joints — never on plastic.
- Diameter: across the threads an M1.4 screw measures about 1.4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.3 mm from one thread crest to the next (33.33 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 4–5 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M1.4 heads take PH000 / PH00 for Phillips and T2–T3 for Torx, and a 1.3 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 M1.4 is about 8-12 N·cm into metal threads and 4-7 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.4
- M1.4 is THE Samsung Galaxy internal screw across S, A, M and Note lines — but lengths run 2.3mm to 4mm+ and are not interchangeable between models.
- Dental implant screws (M1.4/M1.6) are proprietary per system — Bredent, NeoBiotech, Nobel and Straumann are not interchangeable even at the same nominal size.
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.
More in Drones, RC & Gimbals
The same screw also fits
Devices whose records share a thread with DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers, closest length match first.
- Micro RC helicopters also M1.4 × 4–5 mm
- FPV flight-controller / ESC stacks also M1.4 × 4–5 mm
- MTH model train part also M1.4 × 4 mm
- Rimless eyewire tension screw also M1.4 × 4–5 mm
- Eyeglass spring hinge barrel also M1.4 × 4–5 mm
- Dell Precision 5490 also M1.4 × 4 mm
- Dell XPS 13 9300 also M1.4 × 4 mm
- Samsung Galaxy Watch 3 (45mm) screw also M1.4 × 4 mm
Questions about DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers screws
- What size screw does DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers use?
- M1.4 × 4–5 mm for tiny propeller retention screws, not interchangeable between models.
- How long are the screws in DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers?
- The records range from 4 to 5 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M1.4 screw?
- 0.3 mm (coarse), which is the standard pitch for M1.4 machine screws. The tap drill is 1.1 mm and the normal clearance hole is 1.6 mm.
- What screwdriver do I need for DJI Mini 3 / Mini 3 Pro / Mini 4 Pro propellers?
- The sources do not name the drive. For M1.4, Phillips heads normally take PH000 / PH00 and Torx heads T2–T3; socket heads take a 1.3 mm hex key.
- Can I use an imperial screw instead of M1.4?
- No. Imperial look-alike: #0-80 UNF (1.52 mm) — close in diameter, different pitch, do not mix. Use a true M1.4 screw so it does not cross-thread or strip the hole.