Beckhoff industrial PC / I/O chassis ground terminal screw size
M4 · length not stated in the sources
Beckhoff industrial PC / I/O chassis ground terminal takes M4 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
The record covers manual: chassis ground terminal takes a ring terminal suitable for an M4 screw.
This entry is marked confirmed and comes from infosys.beckhoff.com.
An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Beckhoff industrial PC / I/O chassis ground terminal 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: chassis ground terminal takes a ring terminal suitable for an M4 screw | Confirmed |
Fitment records and sources
Manual: chassis ground terminal takes a ring terminal suitable for an M4 screw.
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- A screw that is even 1 mm too long in a laptop base can push into the keyboard, battery or a board trace, so match the length position by position.
- 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
- There is no single standard Picatinny/rail screw size; makers use metric M3/M4 and imperial 6-48 or 8-40 interchangeably. Always measure the existing screw.
- Some rackmount KVM switch kits pair M4x10 bracket-to-rack screws with M3.2x4.5 bracket-to-chassis screws (non-standard M3.2, not a true M3), so kits are not fully interchangeable with generic M3/M4 hardware.
More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Beckhoff industrial PC / I/O chassis ground terminal, closest length match first.
- Dell Inspiron 27 7775 Aio also M4
- Mini-PC VESA brackets (Intel NUC, Mac mini) also M4
- Schneider Electric Box iPC Universal / Performance also M4
- Mini PC / thin client VESA adapter kit also M4
- Camera/webcam tripod mount thread adapters also M4
- PC case thumbscrews also M4
- SmallRig 26pc Screw Set for Camera Accessories (AAK2326) also M4
- ASUS AIO M3700WUA/WYA all-in-one PC also M4
Questions about Beckhoff industrial PC / I/O chassis ground terminal screws
- What size screw does Beckhoff industrial PC / I/O chassis ground terminal use?
- M4 for manual: chassis ground terminal takes a ring terminal suitable for an M4 screw.
- How long are the screws in Beckhoff industrial PC / I/O chassis ground terminal?
- 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 Beckhoff industrial PC / I/O chassis ground terminal?
- 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.