Siemens SIMATIC ET 200AL distributed I/O functional earth screw size
M4 · length not stated in the sources
Our records put Siemens SIMATIC ET 200AL distributed I/O functional earth on M4 screws. None of the sources we found gives an exact length, so measure the original before you order.
Where it is used: manual: 2 x M4 fastening screws plus an M4 cable lug for functional earth on non-conductive substrate.
This entry is marked confirmed and comes from docs.tia.siemens.cloud.
For reference, M4 is 4 mm across the threads at 0.7 mm pitch. The imperial size people confuse it with: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Siemens SIMATIC ET 200AL distributed I/O functional earth 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 | not stated | 0.7 mm | not stated | not stated | Manual: 2 x M4 fastening screws plus an M4 cable lug for functional earth on non-conductive substrate | Confirmed |
Fitment records and sources
Manual: 2 x M4 fastening screws plus an M4 cable lug for functional earth on non-conductive substrate.
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Check the strength class stamped on the head (8.8, 10.9, A2-70) and replace like for like.
- 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: 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 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.
- Grounding/earth-stud screws on hazardous-area (ATEX/IECEx) gas detectors are commonly M4 even though the enclosure body uses larger threaded glands — don't extrapolate the earth screw size to the whole unit.
More in Industrial & Machinery
The same screw also fits
Devices whose records share a thread with Siemens SIMATIC ET 200AL distributed I/O functional earth, closest length match first.
- OPEX SureSort mail/parcel sorting machine electrical cabinet also M4
- Milwaukee M18 FUEL 16in chainsaw (54-40-1640) also M4
- Singer Viking Emerald 203 sewing machine also M4
- Power tool battery pack shell also M4
- GCX barcode scanner adapter base plate also M4
- Ryobi / Homelite trimmer housing (part 661189003) also M4
- Juki sewing machines also M4
- Contender Planetary Mixer MXP004/MXP005 (commercial bakery mixer) electrical diagram terminal screws also M4
Questions about Siemens SIMATIC ET 200AL distributed I/O functional earth screws
- What size screw does Siemens SIMATIC ET 200AL distributed I/O functional earth use?
- M4 for manual: 2 x M4 fastening screws plus an M4 cable lug for functional earth on non-conductive substrate.
- How long are the screws in Siemens SIMATIC ET 200AL distributed I/O functional earth?
- 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 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 Siemens SIMATIC ET 200AL distributed I/O functional earth?
- 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.