Telescope visual backs and eyepiece holders screw size
M4 · 12 mm long
Telescope visual backs and eyepiece holders takes M4 metric screws, 12 mm long.
It is listed for knurled locking thumbscrew clamping the eyepiece.
Head and drive, as the source states them: thumb screw (knurled) head.
This entry is marked confirmed and comes from omegon.eu.
An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Telescope visual backs and eyepiece holders 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 | 12 mm | 0.7 mm | Thumb screw (knurled) | not stated | knurled locking thumbscrew clamping the eyepiece | Confirmed |
Fitment records and sources
knurled locking thumbscrew clamping the eyepiece
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- VESA holes are threaded inserts in the back cover; if a screw stops early, back it out rather than forcing it, because a bottomed-out screw can crack the panel housing.
- 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: for thumb screw (knurled) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 12 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- 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
- Ideal Scope Mounting System manuals disagree between revisions (M4 vs M5 clamping screws) - check your own manual.
- Display mounts mix systems: the screen side is metric M4/M6, but the wall side of many mounts uses imperial wood screws such as #14 x 2.5in.
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.
More in Displays, TVs & Mounts
The same screw also fits
Devices whose records share a thread with Telescope visual backs and eyepiece holders, closest length match first.
- Speaker grille and handle hardware also M4 × 12 mm
- LG 55LV5500 also M4 × 12 mm
- Toshiba 32LF221U21 also M4 × 12 mm
- LG 50PZ950 also M4 × 12 mm
- GCX 75/100mm VESA flush display mount also M4 × 12 mm
- LG 55LW5700 also M4 × 12 mm
- LED video wall cabinet top screw F and side screw D also M4 × 12 mm
- Philips IntelliVue MP80/MP90 monitor also M4 × 12 mm
Questions about Telescope visual backs and eyepiece holders screws
- What size screw does Telescope visual backs and eyepiece holders use?
- M4 × 12 mm for knurled locking thumbscrew clamping the eyepiece.
- How long are the screws in Telescope visual backs and eyepiece holders?
- The record gives 12 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Telescope visual backs and eyepiece holders?
- 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.