DJI O3 Air Unit camera module screw size
M2 · length not stated in the sources
The screws used on DJI O3 Air Unit camera module are M2. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: 20 x 21.2mm camera module mounts with M2 screws.
This entry is marked confirmed and comes from shuntool.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.
DJI O3 Air Unit camera module 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 | not stated | 0.4 mm | not stated | not stated | 20 x 21.2mm camera module mounts with M2 screws | Confirmed |
Fitment records and sources
20 x 21.2mm camera module mounts with M2 screws
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
How to check the screw before you buy
- Camera and optics hardware often uses short screws into thin threaded plates, so check engagement before tightening fully.
- 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.
- 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.
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Devices whose records share a thread with DJI O3 Air Unit camera module, closest length match first.
- Some Nikkor lens mounts also M2
- Basler ace Classic/U USB 3.0 also M2
- Basler dart M screw kit (order no. 2200002092) also M2
- Olympus BH-2 / BH2-5RE microscope nosepiece also M2
- Basler dart M industrial camera mount kit also M2
- Olympus BH-2 / MIC-D microscope frame also M2
- Ophthalmic instrument service hardware (Duclos Lenses) also M2
- Newport M-TSP-1 miniature post also M2
Questions about DJI O3 Air Unit camera module screws
- What size screw does DJI O3 Air Unit camera module use?
- M2 for 20 x 21.2mm camera module mounts with M2 screws.
- How long are the screws in DJI O3 Air Unit camera module?
- 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 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 DJI O3 Air Unit camera module?
- 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.