Mignon index typewriter actuator arm (Zamac casting repair) screw size
M2 · length not stated in the sources
If you are replacing a screw on Mignon index typewriter actuator arm (Zamac casting repair), the thread is M2. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for restoration blog documents replacing a worn steel pin in the actuator rod with 'an M2 screw' and matching 'M2 nut' as a tight-fit, non-authentic but practical repair fastener: 'This screw is not authentic... an M2 screw won't need hammering close to fragile Zamac castings.'.
This entry is marked reported and comes from badonoer.blogspot.com.
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Mignon index typewriter actuator arm (Zamac casting repair) 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 |
|---|---|---|---|---|---|---|
| M2 | not stated | 0.4 mm | not stated | not stated | Restoration blog documents replacing a worn steel pin in the actuator rod with 'an M2 screw' and matching 'M2 nut' as a tight-fit, non-authentic but practical repair fastener: 'This screw is not authentic... an M2 screw won't need hammering close to fragile Zamac castings.' | Reported |
Fitment records and sources
Restoration blog documents replacing a worn steel pin in the actuator rod with 'an M2 screw' and matching 'M2 nut' as a tight-fit, non-authentic but practical repair fastener: 'This screw is not authentic... an M2 screw won't need hammering close to fragile Zamac castings.'
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
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 M2 screw measures about 2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.4 mm from one thread crest to the next (25 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 M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 M2 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2
- M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.
- Framework 13 and 16 use five thread families (M1.2 to M2.5) with overlapping lengths; buy Framework's own fastener kit rather than generic M2 screws.
More in Other Equipment
The same screw also fits
Devices whose records share a thread with Mignon index typewriter actuator arm (Zamac casting repair), closest length match first.
- Xbox wireless controllers also M2
- DJI Flame Wheel F450 / F550 also M2
- Raspberry Pi HATs & cases also M2
- Raspberry Pi 5 board mounting holes also M2
- GoPro HERO8 replacement fingers also M2
- ASUS / MSI / Gigabyte / ASRock motherboards also M2
- Nintendo Switch battery shield also M2
- TFV12 rebuildable vape tank grub/set screws also M2
Questions about Mignon index typewriter actuator arm (Zamac casting repair) screws
- What size screw does Mignon index typewriter actuator arm (Zamac casting repair) use?
- M2 for restoration blog documents replacing a worn steel pin in the actuator rod with 'an M2 screw' and matching 'M2 nut' as a tight-fit, non-authentic but practical repair fastener: 'This screw is not authentic... an M2 screw won't need hammering close to fragile Zamac castings.'.
- How long are the screws in Mignon index typewriter actuator arm (Zamac casting repair)?
- 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 M2 screw?
- 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
- What screwdriver do I need for Mignon index typewriter actuator arm (Zamac casting repair)?
- The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
- Can I use an imperial screw instead of M2?
- No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.