How long are the screws in Spectacle frame hinge/temple screws (ISO 11381 standard)?

The records range from 2 to 4 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M1.2 screw?

0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.

What screwdriver do I need for Spectacle frame hinge/temple screws (ISO 11381 standard)?

The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.

Can I use an imperial screw instead of M1.2?

No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Spectacle frame hinge/temple screws (ISO 11381 standard)?

TechSpareWarehouse (our own store) lists M1.2 x 2mm, which matches the length in the records above.

Spectacle frame hinge/temple screws (ISO 11381 standard) screw size

M1.2 · 2 to 4 mm long

The screws used on Spectacle frame hinge/temple screws (ISO 11381 standard) are M1.2 in lengths from 2 to 4 mm.

It is listed for ISO 11381:2016 defines spectacle-frame screw threads including M1.2 x 0.25 as a standard ophthalmic optics thread size.

This entry is marked confirmed and comes from standards.iteh.ai.

An M1.2 screw is 1.2 mm in diameter with a 0.25 mm pitch, tapped with a 0.95 mm drill; imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute.

Spectacle frame hinge/temple 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
M1.2	2–4 mm	0.25 mm	not stated	not stated	ISO 11381:2016 defines spectacle-frame screw threads including M1.2 x 0.25 as a standard ophthalmic optics thread size	Confirmed

Fitment records and sources

M1.22-4 mm (standard range per ISO 11381 series)confirmed

ISO 11381:2016 defines spectacle-frame screw threads including M1.2 x 0.25 as a standard ophthalmic optics thread size

pitch 0.25 mm · tap 0.95 mm · clearance 1.4 mm · PH000 / JIS 00 / Torx T1–T2

Source

How to check the screw before you buy

Camera and optics hardware often uses short screws into thin threaded plates, so check engagement before tightening fully.
Diameter: across the threads an M1.2 screw measures about 1.2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.25 mm from one thread crest to the next (40 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 2–4 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M1.2 heads take PH000 / JIS 00 for Phillips and T1–T2 for Torx; 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 M1.2 is about 5-8 N·cm into metal threads and 3-5 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M1.2

M1.2 and M1.4 look identical in an eyeglass repair kit — the wrong one strips soft acetate or metal hinges.

Pitch gauge · Screw size finder · Torque guide

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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The same screw also fits

Devices whose records share a thread with Spectacle frame hinge/temple screws (ISO 11381 standard), closest length match first.

DSLR & mirrorless cameras also M1.2 × 2–3 mm
Sunglasses temple tip / end piece also M1.2 × 2–3 mm
Camera lens grub/set screws (rangefinder & vintage lens mounts) also M1.2 × 2–3 mm
Micro FPV / tiny-whoop drones also M1.2 × 2–4 mm
FPV camera lens mounts also M1.2 × 2–4 mm
Eyeglass hinge / eyewire screw also M1.2 × 2–3 mm
HP Spectre Pro13 G1 also M1.2 × 2.5 mm
Samsung Galaxy S24 also M1.2 × 2 mm

Questions about Spectacle frame hinge/temple screws (ISO 11381 standard) screws

What size screw does Spectacle frame hinge/temple screws (ISO 11381 standard) use?: M1.2 × 2–4 mm for ISO 11381:2016 defines spectacle-frame screw threads including M1.2 x 0.25 as a standard ophthalmic optics thread size.
How long are the screws in Spectacle frame hinge/temple screws (ISO 11381 standard)?: The records range from 2 to 4 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M1.2 screw?: 0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.
What screwdriver do I need for Spectacle frame hinge/temple screws (ISO 11381 standard)?: The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.
Can I use an imperial screw instead of M1.2?: No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Spectacle frame hinge/temple screws (ISO 11381 standard)?: TechSpareWarehouse (our own store) lists M1.2 x 2mm, which matches the length in the records above.

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