Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U) screw size
M4 · length not stated in the sources
The screws used on Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U) are M4. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: tech specs list 'Screws: #10-32, M4' - both imperial and metric options supplied.
This entry is marked confirmed and comes from techspecs.ui.com.
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U) 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 |
|---|---|---|---|---|---|---|
| M4 | not stated | 0.7 mm | not stated | not stated | Tech specs list 'Screws: #10-32, M4' - both imperial and metric options supplied | Confirmed |
Fitment records and sources
Tech specs list 'Screws: #10-32, M4' - both imperial and metric options supplied
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- Diameter: across the threads an M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 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 M4 heads take PH2 for Phillips and T20 for Torx, and a 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 M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- Display mounts mix systems: the screen side is metric M4/M6, but the wall side of many mounts uses imperial wood screws such as #14 x 2.5in.
- There is no single standard Picatinny/rail screw size; makers use metric M3/M4 and imperial 6-48 or 8-40 interchangeably. Always measure the existing screw.
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Devices whose records share a thread with Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U), closest length match first.
- ETC Unison DRd Rack Enclosure (dimming rack for theatrical rigging systems) also M4
- SICK sensingCam SEC200/400 L-bracket kit also M4
- DIN rail clips and enclosure brackets also M4
- Metcase Technomet-Control instrument enclosure also M4
- Autonics LSE-4A5R2 2D laser scanner (AGV navigation) also M4
- Whirlpool front-load washer electronic control board mounting screws also M4
- Elo EMV bracket pan-head screw (Bag P) also M4
- Tesla Universal Wall Connector (48A single phase) also M4
Questions about Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U) screws
- What size screw does Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U) use?
- M4 for tech specs list 'Screws: #10-32, M4' - both imperial and metric options supplied.
- How long are the screws in Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U)?
- 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 M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for Ubiquiti UniFi rack ear kit screws (UACC-Rack-Ear, 1U/2U)?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.