European mortise lock faceplates screw size
M4 · 10 to 20 mm long
Our records put European mortise lock faceplates on M4 screws in lengths from 10 to 20 mm.
Where it is used: faceplate and strike screws in metric door hardware.
This entry is marked reported.
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.
European mortise lock faceplates 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 | 10–20 mm | 0.7 mm | not stated | not stated | Faceplate and strike screws in metric door hardware | Reported |
Fitment records and sources
Faceplate and strike screws in metric door hardware
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Frame and motor screws must not reach the motor windings; check the length against the motor's mounting depth.
- 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 records span 10–20 mm, which means different positions take different lengths — match each hole to its own screw.
- 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
- Most HVAC chassis hardware in US-market units is imperial; metric shows up mainly on European-made components.
- Pinball machines are historically imperial (UNC/UNF). Metric M4 shows up mainly in specific parts like cooling fans or in European rebuilds.
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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Devices whose records share a thread with European mortise lock faceplates, closest length match first.
- DJI Agras Agras T25/T50 spray drone screw with pad also M4 × 12 mm
- Meccano boxed sets (modern metric era) and compatible parts also M4 × 10–20 mm
- GoPro-style action cam mount on FPV frames also M4 × 15–20 mm
- Maytronics Dolphin robotic pool cleaner (Ad-series/other Dolphin models) also M4 × 14 mm
- Padlock and safe internals also M4 × 10–12 mm
- goBILDA metric building system also M4 × 10–20 mm
- HP LaserJet family common hardware also M4 × 10–14 mm
- Mid-size drone frames also M4 × 10–16 mm
Questions about European mortise lock faceplates screws
- What size screw does European mortise lock faceplates use?
- M4 × 10–20 mm for faceplate and strike screws in metric door hardware.
- How long are the screws in European mortise lock faceplates?
- The records range from 10 to 20 mm depending on the position, so match each screw to its own hole.
- 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 European mortise lock faceplates?
- 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.