Ubiquiti UniFi AP-PRO access point screw size
M3 · 50 mm long
Ubiquiti UniFi AP-PRO access point takes M3 metric screws, 50 mm long.
There are 2 separate fitment records for it, including official Quick Start Guide package contents list M3x50 flat head mounting screws (Qty 3) w (M3) and package contents: flat head screws M3 x 50 and M3 keps nuts (M3).
Head and drive, as the sources state them: flat / countersunk head.
2 of the 2 records are marked confirmed, drawn from 1 source (dl.ubnt.com).
M3 means a 3 mm nominal diameter with a 0.5 mm thread pitch. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Ubiquiti UniFi AP-PRO access point 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 | 50 mm | 0.5 mm | Flat / countersunk | not stated | Official Quick Start Guide package contents list M3x50 flat head mounting screws (Qty 3) with matching M3 keps nuts | Confirmed |
| M3 | 50 mm | 0.5 mm | Flat / countersunk | not stated | Package contents: flat head screws M3 x 50 and M3 keps nuts | Confirmed |
Fitment records and sources
Official Quick Start Guide package contents list M3x50 flat head mounting screws (Qty 3) with matching M3 keps nuts
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Package contents: flat head screws M3 x 50 and M3 keps nuts
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- 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: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
- The record states 50 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- 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
- 2020 extrusion T-nuts come in M3/M4/M5 and are not interchangeable — M3 is accessory-only, M5 is structural.
- Blender, toothbrush and shaver teardowns list Torx/Phillips bit sizes only; a T8 bit tells you nothing about the thread.
More in Electronics, Racks & Enclosures
The same screw also fits
Devices whose records share a thread with Ubiquiti UniFi AP-PRO access point, closest length match first.
- Wurth Elektronik WA-SPAIE plastic spacer stud also M3 × 50 mm
- Ubiquiti UniFi AP-AC-LITE access point also M3 × 50 mm
- Wurth Elektronik WA-SSTIE steel spacer stud also M3 × 50 mm
- Ubiquiti UniFi UAP-AC access point also M3 × 50 mm
- Ubiquiti UniFi AP / UAP-LR ceiling & wall mount kit also M3 × 50 mm
- Ubiquiti UniFi UAP / UAP-LR access point also M3 × 50 mm
- Ubiquiti UniFi AP ceiling mount also M3 × 50 mm
- Ubiquiti UniFi AP-AC-PRO access point also M3 × 50 mm
Questions about Ubiquiti UniFi AP-PRO access point screws
- What size screw does Ubiquiti UniFi AP-PRO access point use?
- M3 × 50 mm for official Quick Start Guide package contents list M3x50 flat head mounting screws (Qty 3) with matching M3 keps nuts; M3 × 50 mm for package contents: flat head screws M3 x 50 and M3 keps nuts.
- How long are the screws in Ubiquiti UniFi AP-PRO access point?
- The record gives 50 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Ubiquiti UniFi AP-PRO access point?
- 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.