OptoSigma OBC-4560-M6 optical breadboard screw size
M6 · length not stated in the sources
Our records put OptoSigma OBC-4560-M6 optical breadboard on M6 screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers M6 tapped through-holes on 25mm spacing (M4 variant also offered).
This entry is marked confirmed and comes from optosigma.com.
For reference, M6 is 6 mm across the threads at 1 mm pitch. The imperial size people confuse it with: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
OptoSigma OBC-4560-M6 optical breadboard 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 |
|---|---|---|---|---|---|---|
| M6 | not stated | 1 mm | not stated | not stated | M6 tapped through-holes on 25mm spacing (M4 variant also offered) | Confirmed |
Fitment records and sources
M6 tapped through-holes on 25mm spacing (M4 variant also offered)
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
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 M6 screw measures about 6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 1 mm from one thread crest to the next (10 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 M6 heads take PH3 for Phillips and T30 for Torx, and a 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 M6 is about 7-10 N·m into metal threads and 2.5-4.0 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M6
- TS-Optics Losmandy-style dovetail bars drill through-holes sized to accept either M6 metric screws or 1/4" imperial screws interchangeably in the same countersunk holes.
- Optical tables come in metric (M6 on 25mm centres) and imperial (1/4-20 on 1in centres) — mixing them cross-threads the table.
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 OptoSigma OBC-4560-M6 optical breadboard, closest length match first.
- Optical breadboard / optical table (metric) also M6
- Newport M-SP-2 optical post also M6
- EchoMaster PCAM-JP3 spare-tire mount camera also M6
- Newport M-ST-UT2-410-8 SmartTable also M6
- Vixen POLARIE dovetail slide bar also M6
- Christie HS / Jazz Series UST lens support also M6
- ScopeStuff nylon thumbscrew kit also M6
- Newport M-SP-2 / M-SP-4 optical posts also M6
Questions about OptoSigma OBC-4560-M6 optical breadboard screws
- What size screw does OptoSigma OBC-4560-M6 optical breadboard use?
- M6 for M6 tapped through-holes on 25mm spacing (M4 variant also offered).
- How long are the screws in OptoSigma OBC-4560-M6 optical breadboard?
- 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 M6 screw?
- 1 mm (coarse), which is the standard pitch for M6 machine screws; a 0.75 mm fine pitch exists but is uncommon. The tap drill is 5 mm and the normal clearance hole is 6.6 mm.
- What screwdriver do I need for OptoSigma OBC-4560-M6 optical breadboard?
- The sources do not name the drive. For M6, Phillips heads normally take PH3 and Torx heads T30; socket heads take a 5 mm hex key.
- Can I use an imperial screw instead of M6?
- No. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6. Use a true M6 screw so it does not cross-thread or strip the hole.