Dell P221-OH monitor VESA wall mount screw size
M4 · 10 mm long
The screws used on Dell P221-OH monitor VESA wall mount are M4, 10 mm long.
Where it is used: four VESA screws under the rear plastic cover.
This entry is marked confirmed and comes from manualsdump.com.
For reference, M4 is 4 mm across the threads at 0.7 mm pitch. The imperial size people confuse it with: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Dell P221-OH monitor VESA wall 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 |
|---|---|---|---|---|---|---|
| M4 | 10 mm | 0.7 mm | not stated | not stated | Four VESA screws under the rear plastic cover | Confirmed |
Fitment records and sources
Four VESA screws under the rear plastic cover
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- For a wall or arm mount, the screw has to engage the threaded insert by several turns but must not bottom out, so measure the insert depth and add the thickness of the bracket and any spacers.
- 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.
- The record states 10 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 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.
- VESA fixes the hole pattern and max thread depth, not screw length — length depends on the panel back and any spacers.
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 Displays, TVs & Mounts
The same screw also fits
Devices whose records share a thread with Dell P221-OH monitor VESA wall mount, closest length match first.
- Acer XR342CK also M4 × 10 mm
- Washing machine control panel also M4 × 10 mm
- Dell U3219Q also M4 × 10 mm
- HP EliteDisplay / ProDisplay also M4 × 10 mm
- Panasonic TC-L55DT60 also M4 × 10 mm
- Dell UP3017 also M4 × 10 mm
- Dell U2720QM also M4 × 10 mm
- Dell UP3218K also M4 × 10 mm
Questions about Dell P221-OH monitor VESA wall mount screws
- What size screw does Dell P221-OH monitor VESA wall mount use?
- M4 × 10 mm for four VESA screws under the rear plastic cover.
- How long are the screws in Dell P221-OH monitor VESA wall mount?
- The record gives 10 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Dell P221-OH monitor VESA wall mount?
- 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.