Schneider Electric Altivar 312 drive screw size
M4 / M5 · length not stated in the sources
If you are replacing a screw on Schneider Electric Altivar 312 drive, the thread is M4 and M5. None of the sources we found gives an exact length, so measure the original before you order.
There are 2 separate fitment records for it, including 4 screws fixing EMC clamps (M4) and ground connection screw (M5).
2 of the 2 records are marked confirmed, drawn from 1 source (mroelectric.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.
Schneider Electric Altivar 312 drive 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 | 4 screws fixing EMC clamps | Confirmed |
| M5 | not stated | 0.8 mm | not stated | not stated | ground connection screw | Confirmed |
Fitment records and sources
4 screws fixing EMC clamps
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
ground connection screw
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Industrial parts lists usually give the full callout (thread, length, head, grade); match all four, not just the thread.
- Diameter: across the threads an M4 screw measures about 4 mm with calipers (usually a hair under). This device also uses M5, so measure each screw rather than assuming they match.
- 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 / M5
- Festo sensor brackets are named after the sensor interface (DASP-M4-...), but the bracket's own fixing screws are often a different size (M5/M6/M8).
- M4 and 6-32 UNC share a nominal diameter with different pitch — a classic cross-thread in US-market kits.
- Truss and stage-light clamps use M8 or M10 bolts depending on tube diameter — larger than anything in this database, so don't substitute an M6.
- M5x0.8 is the de facto universal bike thread — confirm 0.8mm pitch before threading into carbon or alloy bosses.
More in Industrial & Machinery
The same screw also fits
Devices whose records share a thread with Schneider Electric Altivar 312 drive, closest length match first.
- Needle plate screw for Bernette/EverSewn/Necchi/Singer industrial-style sewing machines also M4
- Makita DHS680 165mm cordless circular saw also M5
- Milwaukee cordless tool (service bulletin 54-26-2590) also M4
- SICK sensor mounting accessories also M4
- DeWalt D51430 / D51431 pneumatic nailer also M4
- Melco EMC 1 Embroidery Peripheral (textile printing/embroidery machinery) also M4
- Allen-Bradley ControlLogix 1756-A chassis also M4
- Circular saw blade guard pivot also M4
Questions about Schneider Electric Altivar 312 drive screws
- What size screw does Schneider Electric Altivar 312 drive use?
- M4 for 4 screws fixing EMC clamps; M5 for ground connection screw.
- How long are the screws in Schneider Electric Altivar 312 drive?
- 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 Schneider Electric Altivar 312 drive?
- 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.