ISO-KF vacuum flange claw clamps (DN10-DN50) screw size
M6 · length not stated in the sources
ISO-KF vacuum flange claw clamps (DN10-DN50) takes M6 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers M6 clamp screw draws two KF flanges together.
This entry is marked confirmed and comes from qmvacuum.com.
An M6 screw is 6 mm in diameter with a 1 mm pitch, tapped with a 5 mm drill; imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.
ISO-KF vacuum flange claw clamps (DN10-DN50) 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 clamp screw draws two KF flanges togetherwasher / flange face | Confirmed |
Fitment records and sources
M6 clamp screw draws two KF flanges together
pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30
How to check the screw before you buy
- If several screws hold the same part, check that they are all the same length before assuming they are.
- 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
- 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.
- 19-inch rack rails use three incompatible thread standards that share the same square hole: M6, 10-32 UNF and 12-24 UNC. Cage nuts for all of them look identical in a parts bin.
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- GP-SR1-PC200 LiFePO4 battery DIY kit also M6
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- Speck 95-IX / 95-X commercial pool pump also M6
- HDRiG ARRI-standard rosette (31.8mm) also M6
- DIN 965 / ISO 7046 countersunk Phillips screw also M6
- DIN 912 socket-head cap screw also M6
- PrimaLuceLab PLUS dovetail bar interconnection screws also M6
- RF Elements Twin Horn antenna bracket also M6
Questions about ISO-KF vacuum flange claw clamps (DN10-DN50) screws
- What size screw does ISO-KF vacuum flange claw clamps (DN10-DN50) use?
- M6 for M6 clamp screw draws two KF flanges together.
- How long are the screws in ISO-KF vacuum flange claw clamps (DN10-DN50)?
- 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-KF vacuum flange claw clamps (DN10-DN50)?
- 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.