Elo I-Series 4.0 15" touch computer (no-stand model) screw size
M4 · 9.9 mm long
Elo I-Series 4.0 15" touch computer (no-stand model) takes M4 metric screws, 9.9 mm long.
Where it is used: VESA mount holes, x4, min screw depth 8mm from mount surface, max screw length 9.9mm.
This entry is marked confirmed and comes from docs.elotouch.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.
Elo I-Series 4.0 15" touch computer (no-stand model) 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 | 9.9 mm | 0.7 mm | not stated | not stated | VESA mount holes, x4, min screw depth 8mm from mount surface, max screw length 9.9mm | Confirmed |
Fitment records and sources
VESA mount holes, x4, min screw depth 8mm from mount surface, max screw length 9.9mm
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
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 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 9.9 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
- VESA fixes the hole pattern and max thread depth, not screw length — length depends on the panel back and any spacers.
- VESA thread size is set by pattern class: M4 for 75x75/100x100, M6 or M8 for the big 200mm+ patterns. Check the plate on the back of the display.
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Devices whose records share a thread with Elo I-Series 4.0 15" touch computer (no-stand model), closest length match first.
- Acer / ASUS / BenQ monitors also M4 × 9.9 mm
- Washing machine control panel also M4 × 9.9 mm
- HP EliteDisplay / ProDisplay also M4 × 9.9 mm
- Raspberry Pi VESA adapter plates also M4 × 9.9 mm
- Monitor VESA 75x75 / 100x100 also M4 × 9.9 mm
- LED downlight trim and driver also M4 × 9.9 mm
- VESA MIS-D 75/100 display mount also M4 × 9.9 mm
- Dell UltraSharp 22-27in monitors also M4 × 9.9 mm
Questions about Elo I-Series 4.0 15" touch computer (no-stand model) screws
- What size screw does Elo I-Series 4.0 15" touch computer (no-stand model) use?
- M4 × 9.9 mm for VESA mount holes, x4, min screw depth 8mm from mount surface, max screw length 9.9mm.
- How long are the screws in Elo I-Series 4.0 15" touch computer (no-stand model)?
- The record gives 9.9 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 Elo I-Series 4.0 15" touch computer (no-stand model)?
- 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.