OpenFlexure Delta Stage frame screw size
M4 · 6 mm long
The screws used on OpenFlexure Delta Stage frame are M4, 6 mm long.
The record covers 6x M4x6mm button head screws hold the printed frame together.
Head and drive, as the source states them: button head.
This entry is marked confirmed and comes from build.openflexure.org.
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.
OpenFlexure Delta Stage frame 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 | 6 mm | 0.7 mm | Button head | not stated | 6x M4x6mm button head screws hold the printed frame together | Confirmed |
Fitment records and sources
6x M4x6mm button head screws hold the printed frame together
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
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: for button head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 6 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
- Grounding-lug screws on Siemens and Beckhoff gear (M4) are earth hardware, not structural mounting screws — don't reuse them to hold a module.
- 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 OpenFlexure Delta Stage frame, closest length match first.
- DJI RS upper quick-release plate also M4 × 6 mm
- Cognex In-Sight 9000 machine vision system also M4 × 6 mm
- Dashcam / action-cam suction mount ball joint also M4 × 6 mm
- Telescope finder-scope shoe / base (TS-Optics) also M4 × 6 mm
- Underwater camera housing latch and port also M4 × 6 mm
- Electronics enclosures also M4 × 6 mm
- Elo Pay 15.6-inch Tap-to-Pay POS terminal, VESA mount also M4 × 6 mm
- Makita GB801 also M4 × 6 mm
Questions about OpenFlexure Delta Stage frame screws
- What size screw does OpenFlexure Delta Stage frame use?
- M4 × 6 mm for 6x M4x6mm button head screws hold the printed frame together.
- How long are the screws in OpenFlexure Delta Stage frame?
- The record gives 6 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 OpenFlexure Delta Stage frame?
- 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.