ISO 9409-1-50-4-M6 robot tool flange screw size
M6 · length not stated in the sources
The screws used on ISO 9409-1-50-4-M6 robot tool flange are M6. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: standard 4x M6 low-head socket cap screws on the 50mm robot tool-flange bolt circle.
Head and drive, as the source states them: socket cap head and Hex socket (Allen) drive.
This entry is marked confirmed and comes from assets.robotiq.com.
M6 means a 6 mm nominal diameter with a 1 mm thread pitch. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
ISO 9409-1-50-4-M6 robot tool flange 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 | Socket cap | Hex socket (Allen) | standard 4x M6 low-head socket cap screws on the 50mm robot tool-flange bolt circlewasher / flange face | Confirmed |
Fitment records and sources
standard 4x M6 low-head socket cap screws on the 50mm robot tool-flange bolt circle
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- Printer and CNC builds usually publish a bill of materials; when it lists a length, follow it, since extrusion T-nuts and motor faces have fixed thread depths.
- 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: for socket cap screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- Driver: the source names a Hex socket (Allen) drive. For comparison, standard M6 heads take PH3 (Phillips) or T30 (Torx), or a 5 mm hex key.
- 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
- 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.
- VESA displays over 50kg move up to M8 x 1.25, which is outside metric M6 hardware - don't force an M6 bolt into a heavy-panel mount.
More in 3D Printing, CNC & Robotics
The same screw also fits
Devices whose records share a thread with ISO 9409-1-50-4-M6 robot tool flange, closest length match first.
- 3030/4040 extrusion end tap also M6
- E3D V6 and clone hotend nozzles also M6
- Gimatic MFI-A374-A/B mounting flange for Mechatronics grippers on UR robots also M6
- Carbide 3D 80mm VFD spindle mount kit also M6
- Robotiq 2F-85 / 2F-140 gripper (Universal Robots) also M6
- Universal Robots e-Series tool flange (UR3e/UR5e/UR10e) also M6
- Avid CNC Laser Kit also M6
- RatRig V-Core 3 also M6
Questions about ISO 9409-1-50-4-M6 robot tool flange screws
- What size screw does ISO 9409-1-50-4-M6 robot tool flange use?
- M6 for standard 4x M6 low-head socket cap screws on the 50mm robot tool-flange bolt circle.
- How long are the screws in ISO 9409-1-50-4-M6 robot 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 ISO 9409-1-50-4-M6 robot tool flange?
- The source lists a Hex socket (Allen) drive. Standard M6 heads otherwise take PH3 (Phillips) or T30 (Torx), or 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.