Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount screw size
M4 · length not stated in the sources
If you are replacing a screw on Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount, the thread is M4. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for M4 tap.
This entry is marked confirmed and comes from thorlabs.com.
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount 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 | not stated | 0.7 mm | not stated | not stated | M4 tap | Confirmed |
Fitment records and sources
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 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: 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 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
- Camera rig/cage accessories (SmallRig, Wooden Camera/Metabones) frequently mix M4 structural screws with 1/4-20 and 3/8-16 imperial mounting points on the same product — verify which specific fastener a manual is referencing before ordering replacements.
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
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 Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount, closest length match first.
- Thorlabs CP08/M SM1-threaded cage plate also M4
- Thorlabs LCP35/M 60 mm cage plate also M4
- Sig Sauer ROMEO1 Pro mounting screw also M4
- Shield Sights optic-ready / dovetail red dot mounts also M4
- ATC (Advanced Transportation Controller) traffic signal cabinet standard also M4
- Thorlabs KMS/M compact kinematic mirror mount also M4
- Thorlabs CP14/M 30mm cage plate also M4
- SmallRig 2245 SSD Clamp for BMPCC 4K/6K cages also M4
Questions about Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount screws
- What size screw does Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount use?
- M4 for M4 tap.
- How long are the screws in Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount?
- 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 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 Thorlabs LCP35/M 60mm cage plate with Ø2" double-bore optic mount?
- 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.