Elo Z20 POS stand Gen2 (E378179) screw size
M3 / M4 · 6 mm long
If you are replacing a screw on Elo Z20 POS stand Gen2 (E378179), the thread is M3 and M4, 6 mm long.
There are 2 separate fitment records for it, including pan-head screw for VESA cover (M3) and pan-head screw for base plate (M4).
Head and drive, as the sources state them: pan head.
2 of the 2 records are marked confirmed, drawn from 1 source (docs.elotouch.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.
Elo Z20 POS stand Gen2 (E378179) 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 | 6 mm | 0.5 mm | Pan head | not stated | pan-head screw for VESA cover | Confirmed |
| M4 | 6 mm | 0.7 mm | Pan head | not stated | pan-head screw for base plate | Confirmed |
Fitment records and sources
pan-head screw for VESA cover
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
pan-head screw for base plate
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 M3 screw measures about 3 mm with calipers (usually a hair under). This device also uses M4, 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: for pan head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 6 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 / M4
- Telescope thumbscrews are sold in a wide non-metric legacy range too (1/4-20, 8-32, 10-32 on many Meade/Celestron mounts), so metric M3/M4 fitment applies mainly to newer/international accessory ecosystems (SkyWatcher, generic 1.25" accessories) and should not be assumed universal.
- M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.
- TV mount screw size follows the VESA pattern, not the brand — the same maker's small and large sets need M4, M6 or M8.
- 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.
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 6mm Replacement Screws for XLR Audio Connectors Phillips Wafer Head 50-Pack
$4.99 -
M3 x 6mm Phillips Wafer Head Carbon Steel Machine Screws for XLR Audio Connectors | 50-Pack (Black)
$4.99
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M3 x 6mm Phillips Wafer Head Screw for 3D Printer Frame Assembly - Single Replacement Black
$0.10 each · min. 50
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M3 x 6mm Phillips Wafer Head Screw for Boutique Guitar Pedal Enclosure - Single Replacement Black
$0.10 each · min. 50
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Devices whose records share a thread with Elo Z20 POS stand Gen2 (E378179), closest length match first.
- Dell P2012H also M3 × 6 mm
- Dell U2719D also M3 × 6 mm
- Dell S2425H monitor also M3 × 6 mm
- Dell E2014T also M3 × 6 mm
- Dell P2317H also M3 × 6 mm
- HP V22i G5 also M3 × 6 mm
- Dell P2319H also M3 × 6 mm
- Dell P2421DC also M3 × 6 mm
Questions about Elo Z20 POS stand Gen2 (E378179) screws
- What size screw does Elo Z20 POS stand Gen2 (E378179) use?
- M3 × 6 mm for pan-head screw for VESA cover; M4 × 6 mm for pan-head screw for base plate.
- How long are the screws in Elo Z20 POS stand Gen2 (E378179)?
- The record gives 6 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 Elo Z20 POS stand Gen2 (E378179)?
- 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 Elo Z20 POS stand Gen2 (E378179)?
- TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.