Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount screw size
M3 / M4 / M5 / M6 · 12 to 25 mm long
Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount takes M3, M4, M5 and M6 metric screws in lengths from 12 to 25 mm.
There are 4 separate fitment records for it, including included fastener set explicitly lists M3 x 12mm screws for small-format projector adapter (M3), hardware bag includes M4 x 12mm projector adapter screws (M4) and hardware bag includes M5 x 12mm projector adapter screws (M5), plus 1 more in the table below.
4 of the 4 records are marked confirmed, drawn from 1 source (standsandmounts.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.
Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount 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 | 12 mm | 0.5 mm | not stated | not stated | Included fastener set explicitly lists M3 x 12mm screws for small-format projector adapter plates | Confirmed |
| M4 | 12 mm | 0.7 mm | not stated | not stated | Hardware bag includes M4 x 12mm projector adapter screws | Confirmed |
| M5 | 12 mm | 0.8 mm | not stated | not stated | Hardware bag includes M5 x 12mm projector adapter screws | Confirmed |
| M6 | 12–25 mm | 1 mm | not stated | not stated | Hardware bag includes M6 x 12mm and M6 x 25mm screws for adapter plate and ceiling plate assembly | Confirmed |
Fitment records and sources
Included fastener set explicitly lists M3 x 12mm screws for small-format projector adapter plates
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Hardware bag includes M4 x 12mm projector adapter screws
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
Hardware bag includes M5 x 12mm projector adapter screws
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
Hardware bag includes M6 x 12mm and M6 x 25mm screws for adapter plate and ceiling plate assembly
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- VESA holes are threaded inserts in the back cover; if a screw stops early, back it out rather than forcing it, because a bottomed-out screw can crack the panel housing.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). This device also uses M4 / M5 / M6, so measure each screw rather than assuming they match.
- 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.
- The records span 12–25 mm, which means different positions take different lengths — match each hole to its own screw.
- 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 / M4 / M5 / M6
- Thorlabs' 16mm cage system standard plates use dual 4-40 (UNC) and M3 taps on the same plate (e.g., SP01), so metric and imperial fasteners are both valid depending on the region/kit purchased.
- Camera rig/cage accessories (SmallRig, Wooden Camera/Metabones) frequently mix M4 structural screws with 1/4-20 and 3/8-16 imperial mounting points on the same product — verify which specific fastener a manual is referencing before ordering replacements.
- Espresso/coffee-equipment M5 and M6 socket-head screws (DIN 7984/UNI 9327) are cross-brand standard fasteners shared across CMA, Astoria, and La Cimbali brewing-group hardware, so a single screw often services multiple manufacturers' machines.
- The same StarTech universal projector mount ships with M3, M4, M5, and M6 screw sets simultaneously so the installer can pick whichever matches the projector's own threaded inserts — metric size is projector-dependent, not mount-dependent.
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.
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M3 x 12mm Phillips Wafer Head Screw for Camera Cage & Battery Slide Mount - Pack of 50 Black
$6.49 -
M3 x 12mm Phillips Wafer Head Screw for Electric Scooter LCD Dashboard - Single Replacement Black
$0.10 each · min. 50
-
M3 x 12mm Phillips Wafer Head Screw for RC Car/Truck Chassis Mount - Single Replacement Black
$0.10 each · min. 50
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M4 x 12mm Black Wafer Head Chainsaw & Cut-off Saw Screws for STIHL MS 460, MS 362, TS480i & TS500i (IS-M4x12) – 10-Pack Replacement
$5.49Choose size -
M4 x 12mm Black Wafer Head Monitor VESA, Neck & Stand Screws for Dell UltraSharp U4320Q & Sceptre Monitors – 8-Pack Replacement
$5.49Choose size -
M5 x 12mm Black Wafer Head Cut-off Saw Screws for STIHL TS400 Cut-off Saw (replaces IS-M5x12 9022 341 0960) – 10-Pack Replacement
$5.99Choose size -
M5 x 12mm Black Wafer Head Generator Cover Screws for Honda EM, EB, EG Generators & EU3200i (replaces 90102-Z21-000) – 10-Pack Replacement
$5.99Choose size -
M6 x 12mm Black Wafer Head TV Back-Panel Screws for Vizio VQD65R-1004, VQD70R-1001, VQM55C-1004, VQM65C-1004 – 8-Pack Replacement
$6.99Choose size
More in Displays, TVs & Mounts
The same screw also fits
Devices whose records share a thread with Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount, closest length match first.
- Bosch Smart System 1-arm handlebar support (shell and clamp mounting) also M4 × 12 mm
- LED downlight trim and driver also M4 × 12 mm
- Monitor VESA 75x75 / 100x100 also M4 × 12 mm
- LG 50PZ950U also M4 × 12 mm
- Unicol VMSV2 VESA direct column fitting also M6 × 16 mm
- LG 55LW9500 also M4 × 12 mm
- VESA FDMI Part F large-format interface also M6 × 12 mm
- Telescope knurled locking/tension screw for diagonals, adapters, focusers also M4 × 12 mm
Questions about Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount screws
- What size screw does Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount use?
- M3 × 12 mm for included fastener set explicitly lists M3 x 12mm screws for small-format projector adapter plates; M4 × 12 mm for hardware bag includes M4 x 12mm projector adapter screws; M5 × 12 mm for hardware bag includes M5 x 12mm projector adapter screws; M6 × 12–25 mm for hardware bag includes M6 x 12mm and M6 x 25mm screws for adapter plate and ceiling plate assembly.
- How long are the screws in Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount?
- The records range from 12 to 25 mm depending on the position, so match each screw to its own hole.
- 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 Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount?
- 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.
- Where can I buy replacement screws for Premier Mounts PBL-UMS/PBL-UMW Universal Projector Mount?
- TechSpareWarehouse (our own store) lists M3 x 12mm, which matches the length in the records above.