Eyeglass eyewire/rim screw (Tabco SM411) screw size
M1.6 · 5.2 mm long
The screws used on Eyeglass eyewire/rim screw (Tabco SM411) are M1.6, 5.2 mm long.
It is listed for slotted rim screw holding lens in frame, 2.0mm head.
Head and drive, as the source states them: Slotted drive.
This entry is marked confirmed and comes from tabcooptical.com.
M1.6 means a 1.6 mm nominal diameter with a 0.35 mm thread pitch. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.
Eyeglass eyewire/rim screw (Tabco SM411) 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 |
|---|---|---|---|---|---|---|
| M1.6 | 5.2 mm | 0.35 mm | not stated | Slotted | slotted rim screw holding lens in frame, 2.0mm head | Confirmed |
Fitment records and sources
slotted rim screw holding lens in frame, 2.0mm head
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
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 M1.6 screw measures about 1.6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.35 mm from one thread crest to the next (28.57 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 record states 5.2 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source names a Slotted drive. For comparison, standard M1.6 heads take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
- Tightening: no device-specific torque is published in these records. The site's general figure for M1.6 is about 12-20 N·cm into metal threads and 6-10 N·cm into plastic bosses; snug it up and stop.
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Devices whose records share a thread with Eyeglass eyewire/rim screw (Tabco SM411), closest length match first.
- Microscope stage clip / condenser also M1.6 × 5.2 mm
- EM-Tec SEM sample holder screw set also M1.6 × 5.2 mm
- Precision instrument hex socket head screws (used in cameras/electronics repair) also M1.6 × 5.2 mm
- Micro drone frame arms also M1.6 × 5.2 mm
- Dental handpiece head also M1.6 × 5.2 mm
- Steam Deck LCD back panel also M1.6 × 5.2 mm
- EM-Tec SEM sample holders also M1.6 × 5.2 mm
- ASUS ROG Ally (RC71L) also M1.6 × 5.2 mm
Questions about Eyeglass eyewire/rim screw (Tabco SM411) screws
- What size screw does Eyeglass eyewire/rim screw (Tabco SM411) use?
- M1.6 × 5.2 mm for slotted rim screw holding lens in frame, 2.0mm head.
- How long are the screws in Eyeglass eyewire/rim screw (Tabco SM411)?
- The record gives 5.2 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M1.6 screw?
- 0.35 mm (coarse), which is the standard pitch for M1.6 machine screws; a 0.2 mm fine pitch exists but is uncommon. The tap drill is 1.25 mm and the normal clearance hole is 1.8 mm.
- What screwdriver do I need for Eyeglass eyewire/rim screw (Tabco SM411)?
- The source lists a Slotted drive. Standard M1.6 heads otherwise take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
- Can I use an imperial screw instead of M1.6?
- No. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent. Use a true M1.6 screw so it does not cross-thread or strip the hole.