Airsoft AEG Version 2 / EHPA gearbox shell screw size
M3 · length not stated in the sources
If you are replacing a screw on Airsoft AEG Version 2 / EHPA gearbox shell, the thread is M3. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for gearbox shell screw sets specified as M3 across V2 gearboxes.
This entry is marked likely and comes from niagaraquartermaster.com.
An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Airsoft AEG Version 2 / EHPA gearbox shell 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 | not stated | 0.5 mm | not stated | not stated | Gearbox shell screw sets specified as M3 across V2 gearboxes | Likely |
Fitment records and sources
Gearbox shell screw sets specified as M3 across V2 gearboxes
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Take one original screw out first and measure it before ordering; the record above tells you the thread, the original screw tells you the exact length and head.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- 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.
- 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
- Printer manuals often mix screw callouts like 'M3*8L' (length in mm after the L) with driver-bit-only references elsewhere in the same manual — only the explicit M-prefixed entries were captured here.
- Eurorack is a strong known case with two competing metric standards (M2.5 for Vector rails, M3 for Schroff/DIN-style and 3U threaded rails); mixing rail types requires matching screw/nut thread.
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Devices whose records share a thread with Airsoft AEG Version 2 / EHPA gearbox shell, closest length match first.
- TO-220 / TO-247 power semiconductor heatsink mounting also M3
- Generic hex socket button head screw (ISO 7380-1) also M3
- ARRI rosette accessory adapter also M3
- 2.5in SATA SSD / HDD also M3
- NBK cleanroom/semiconductor vented socket head cap screw (SVSHT-M3-SD) also M3
- CubeSat Kit solar panel clips and chassis also M3
- Renishaw CMM stylus (TP1, TP6, SP25M probes) also M3
- DIN 912 socket-head cap screw also M3
Questions about Airsoft AEG Version 2 / EHPA gearbox shell screws
- What size screw does Airsoft AEG Version 2 / EHPA gearbox shell use?
- M3 for gearbox shell screw sets specified as M3 across V2 gearboxes.
- How long are the screws in Airsoft AEG Version 2 / EHPA gearbox shell?
- 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 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 Airsoft AEG Version 2 / EHPA gearbox shell?
- 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.