Spectacle frame temple/nose-pad screws (ISO 11381 standard) screw size
M2 · 3 to 6 mm long
The screws used on Spectacle frame temple/nose-pad screws (ISO 11381 standard) are M2 in lengths from 3 to 6 mm.
It is listed for ISO 11381:2016 includes M2.0 x 0.4 among the standard spectacle-frame screw thread sizes.
This entry is marked confirmed and comes from standards.iteh.ai.
M2 means a 2 mm nominal diameter with a 0.4 mm thread pitch. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
Spectacle frame temple/nose-pad screws (ISO 11381 standard) 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 | 3–6 mm | 0.4 mm | not stated | not stated | ISO 11381:2016 includes M2.0 x 0.4 among the standard spectacle-frame screw thread sizes | Confirmed |
Fitment records and sources
ISO 11381:2016 includes M2.0 x 0.4 among the standard spectacle-frame screw thread sizes
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
How to check the screw before you buy
- Eyeglass hinge screws are tiny; a jeweller's screwdriver and a bit of thread-locker or a self-locking screw keep them from backing out.
- 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.
- The records span 3–6 mm, which means different positions take different lengths — match each hole to its own screw.
- 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
- ASUS ROG Ally screw sizes circulating online (M2x16, M2x10) come from a community Q&A, not an ASUS manual — measure before ordering.
- 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.
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 Spectacle frame temple/nose-pad screws (ISO 11381 standard), closest length match first.
- HP Compaq Evo N410c also M2 × 3 mm
- NovelKeys NK65 keyboard also M2 × 4 mm
- Acer Aspire 5670 also M2 × 3 mm
- ASUS ZenBook / Lenovo Yoga display bezel also M2 × 3 mm
- Acer TravelMate 4520 also M2 × 3 mm
- HP EliteBook 750 G1 also M2 × 3 mm
- HP 2533T also M2 × 4 mm
- Dell Inspiron 14 5410 also M2 × 3 mm
Questions about Spectacle frame temple/nose-pad screws (ISO 11381 standard) screws
- What size screw does Spectacle frame temple/nose-pad screws (ISO 11381 standard) use?
- M2 × 3–6 mm for ISO 11381:2016 includes M2.0 x 0.4 among the standard spectacle-frame screw thread sizes.
- How long are the screws in Spectacle frame temple/nose-pad screws (ISO 11381 standard)?
- The records range from 3 to 6 mm depending on the position, so match each screw to its own hole.
- 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 Spectacle frame temple/nose-pad screws (ISO 11381 standard)?
- 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.
- Where can I buy replacement screws for Spectacle frame temple/nose-pad screws (ISO 11381 standard)?
- TechSpareWarehouse (our own store) lists M2 x 3mm, M2 x 4mm and M2 x 5mm, which match lengths in the records above.