Universal Robots UR5e tool flange screw size
M6 · length not stated in the sources
Our records put Universal Robots UR5e tool flange on M6 screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers four M6 threaded holes on the tool flange; class 8.8 bolts torqued to 8 Nm.
This entry is marked confirmed and comes from universal-robots.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.
Universal Robots UR5e tool flange screw specifications
One row per fitment record. Head, drive and torque are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Torque | Where it goes | Status |
|---|---|---|---|---|---|---|---|
| M6 | not stated | 1 mm | not stated | not stated | 8 Nm | Four M6 threaded holes on the tool flange; class 8.8 bolts torqued to 8 Nmwasher / flange face | Confirmed |
Fitment records and sources
Four M6 threaded holes on the tool flange; class 8.8 bolts torqued to 8 Nm
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- Into printed plastic, the screw either self-taps or needs a heat-set insert; machine screws straight into plastic strip easily.
- 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.
Common mix-ups with M6
- UR cobot flange bolts are commonly sold/quoted as 'M6 bolts' but the required length depends on the tool thickness; UR's own guidance is bolt class M6-8.8 to ISO4762 without a fixed length, so length must be selected per adapter/tool stack-up, not assumed as a fixed mm value.
- The same StarTech universal projector mount ships with M3, M4, M5, and M6 screw sets simultaneously so the installer can pick whichever matches the projector's own threaded inserts — metric size is projector-dependent, not mount-dependent.
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Devices whose records share a thread with Universal Robots UR5e tool flange, closest length match first.
- Universal Robots UR3e/UR5e/UR10e/UR16e tool output flange also M6
- 3030 extrusion T-nuts (heavy duty) also M6
- Carbide3D Shapeoko 5 Pro CNC router also M6
- E3D-style hotend nozzles also M6
- Ultimaker Original heated bed / Z-stage upgrade kit also M6
- item T-Slot Nut F (line 8) fastening set with hexagon socket head cap screw also M6
- UR-series robot tool flange (SICK EOAS mounting ring) also M6
- Universal Robots mounting brackets / flanges also M6
Questions about Universal Robots UR5e tool flange screws
- What size screw does Universal Robots UR5e tool flange use?
- M6 for four M6 threaded holes on the tool flange; class 8.8 bolts torqued to 8 Nm.
- How long are the screws in Universal Robots UR5e tool flange?
- 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 Universal Robots UR5e tool flange?
- 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.
- How tight should the M6 screw on Universal Robots UR5e tool flange be?
- The source gives 8 Nm for four M6 threaded holes on the tool flange; class 8.8 bolts torqued to 8 Nm.