ABB REX640 protection & control relay screw size
M5 · length not stated in the sources
The screws used on ABB REX640 protection & control relay are M5. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for manual: mount raising frame to panel with M5 screws; drill four M5 holes per dimensional drawing.
This entry is marked confirmed and comes from search.abb.com.
An M5 screw is 5 mm in diameter with a 0.8 mm pitch, tapped with a 4.2 mm drill; imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
ABB REX640 protection & control relay 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 |
|---|---|---|---|---|---|---|
| M5 | not stated | 0.8 mm | not stated | not stated | Manual: mount raising frame to panel with M5 screws; drill four M5 holes per dimensional drawing | Confirmed |
Fitment records and sources
Manual: mount raising frame to panel with M5 screws; drill four M5 holes per dimensional drawing
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Take one original screw out first and measure it before ordering; the record above tells you the thread, the original screw tells you the exact length and head.
- Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.8 mm from one thread crest to the next (12.5 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 M5 heads take PH2 for Phillips and T25 for Torx, and a 4 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 M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M5
- M5x0.8 is the de facto universal bike thread — confirm 0.8mm pitch before threading into carbon or alloy bosses.
More in Standards & References
The same screw also fits
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- Snare drum strainer butt plate mounting screws also M5
- DIN 965 / ISO 7046 countersunk Phillips screw also M5
- DIN 912 socket-head cap screw also M5
- HBM VKK1-4A load cell junction box also M5
- Rowing machine rail brackets also M5
- Bar-end plug or bar-end shifter also M5
Questions about ABB REX640 protection & control relay screws
- What size screw does ABB REX640 protection & control relay use?
- M5 for manual: mount raising frame to panel with M5 screws; drill four M5 holes per dimensional drawing.
- How long are the screws in ABB REX640 protection & control relay?
- 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 M5 screw?
- 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
- What screwdriver do I need for ABB REX640 protection & control relay?
- The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
- Can I use an imperial screw instead of M5?
- No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.