DIN 41612 backplane / rack card retention screw size
M4 · 6 to 12 mm long
DIN 41612 backplane / rack card retention takes M4 metric screws in lengths from 6 to 12 mm.
The record covers connector and panel fixing screws on rack cards.
This entry is marked reported and comes from sdiy.info.
M4 means a 4 mm nominal diameter with a 0.7 mm thread pitch. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
DIN 41612 backplane / rack card retention 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 | 6–12 mm | 0.7 mm | not stated | not stated | Connector and panel fixing screws on rack cards | Reported |
Fitment records and sources
Connector and panel fixing screws on rack cards
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- 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.
- The records span 6–12 mm, which means different positions take different lengths — match each hole to its own screw.
- 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
- 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).
- 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.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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Devices whose records share a thread with DIN 41612 backplane / rack card retention, closest length match first.
- Elo EMV bracket special pan-head screw (Bag G) also M4 × 10 mm
- POM APM-E Series II parking meter mechanism (single-space parking meter) also M4 × 10 mm
- Midea/Little Swan front-load washer control board technical service guide also M4 × 8 mm
- Crowcon Xgard Bright fixed gas detector (mining/oil & gas field electronics) also M4 × 6–12 mm
- kvmswitchtech CE-6 / Cat5 IP Matrix rackmount KVM switch also M4 × 10 mm
- Rackmount KVM chassis also M4 × 10 mm
- Refrigerator door handle also M4 × 10–12 mm
- SICK BEF-AP-EPA universal sensor adapter bracket also M4 × 10 mm
Questions about DIN 41612 backplane / rack card retention screws
- What size screw does DIN 41612 backplane / rack card retention use?
- M4 × 6–12 mm for connector and panel fixing screws on rack cards.
- How long are the screws in DIN 41612 backplane / rack card retention?
- The records range from 6 to 12 mm depending on the position, so match each screw to its own hole.
- 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 DIN 41612 backplane / rack card retention?
- 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.