Edmund Optics 30mm Universal Cage Plate screw size
M3 · length not stated in the sources
Edmund Optics 30mm Universal Cage Plate takes M3 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: through-holes for mounting to 30mm cage rod system, tapped M3 x 0.5, 3x/8x/4x hole patterns.
This entry is marked confirmed and comes from edmundoptics.de.
An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.
Edmund Optics 30mm Universal Cage Plate 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 |
|---|---|---|---|---|---|---|
| M3 | not stated | 0.5 mm | not stated | not stated | through-holes for mounting to 30mm cage rod system, tapped M3 x 0.5, 3x/8x/4x hole patterns | Confirmed |
Fitment records and sources
through-holes for mounting to 30mm cage rod system, tapped M3 x 0.5, 3x/8x/4x hole patterns
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Do not confuse metric mounting screws with the 1/4-20 or 3/8-16 tripod threads that cameras and clamps also carry.
- Diameter: across the threads an M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.5 mm from one thread crest to the next (20 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 M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M3
- Eurorack rail thread varies by manufacturer: some tapped M2.5, some M3 — not a single universal standard.
- Thorlabs' 16mm cage system standard plates use dual 4-40 (UNC) and M3 taps on the same plate (e.g., SP01), so metric and imperial fasteners are both valid depending on the region/kit purchased.
More in Cameras & Optics
1.25" eyepiece/diagonal/SCT visual back thumb screwAimpoint Comp M4 / M4s LRP & TNP mountAimpoint Micro T-1/T-2/H-1/H-2 standard mountAimpoint Micro T-1/T-2/H-1/H-2 standard mount screwAimpoint SM-2001/2007 Micro T1/T2 mountAirsoft red dot sight mounting screw set (Laylax/Quintes Sence)Airsoft/firearm red-dot sight optic mounting screws (Vortex Viper, Swampfox patterns)Alpine and touring ski bindings (Binding Freedom inserts)Arca-style quick-release plateARRI plate for Sony VENICE 1/2Artesky 340mm Vixen Dovetail BarAstromania finder scope dovetail base
Browse all 278 in Cameras & Optics →The same screw also fits
Devices whose records share a thread with Edmund Optics 30mm Universal Cage Plate, closest length match first.
- Aimpoint Micro T-1/T-2/H-1/H-2 standard mount also M3
- Newport MM-050-HEX-M platform optical mount also M3
- Celestron EdgeHD 8" OTA secondary mirror collimation screws also M3
- Celestron 1.25" 2x Ultima Barlow ('shorty', 1999) retaining screw also M3
- Celestron EdgeHD 11" OTA secondary mirror collimation screws also M3
- Basler ace 2 / racer 2 S camera body mounting screws also M3
- Shield Sights optic-ready / dovetail red dot mounts also M3
- Telescope metric thumb screw for telescope parts also M3
Questions about Edmund Optics 30mm Universal Cage Plate screws
- What size screw does Edmund Optics 30mm Universal Cage Plate use?
- M3 for through-holes for mounting to 30mm cage rod system, tapped M3 x 0.5, 3x/8x/4x hole patterns.
- How long are the screws in Edmund Optics 30mm Universal Cage Plate?
- 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 M3 screw?
- 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
- What screwdriver do I need for Edmund Optics 30mm Universal Cage Plate?
- The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
- Can I use an imperial screw instead of M3?
- No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.