Eurorack module-to-rail mounting screws (Vector/SynthRacks rails) screw size
M2.5 · 6 to 8 mm long
The screws used on Eurorack module-to-rail mounting screws (Vector/SynthRacks rails) are M2.5 in lengths from 6 to 8 mm.
The record covers 'The threaded rails or nuts are made to receive either M2.5 or M3 machine screws... You will need M2.5 x 6mm to fix the modules or M2.5 x 8mm if a washer is used'.
This entry is marked confirmed and comes from synthracks.com.
M2.5 means a 2.5 mm nominal diameter with a 0.45 mm thread pitch. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.
Eurorack module-to-rail mounting screws (Vector/SynthRacks rails) 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 |
|---|---|---|---|---|---|---|
| M2.5 | 6–8 mm | 0.45 mm | not stated | not stated | 'The threaded rails or nuts are made to receive either M2.5 or M3 machine screws... You will need M2.5 x 6mm to fix the modules or M2.5 x 8mm if a washer is used'washer / flange face | Confirmed |
Fitment records and sources
'The threaded rails or nuts are made to receive either M2.5 or M3 machine screws... You will need M2.5 x 6mm to fix the modules or M2.5 x 8mm if a washer is used'
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Board standoffs and enclosure bosses set the usable length: the screw should clamp the board without bottoming in the standoff.
- Diameter: across the threads an M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.45 mm from one thread crest to the next (22.22 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 6–8 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 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 M2.5 is about 45-70 N·cm into metal threads and 20-35 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2.5
- Eurorack rail thread depends on rail brand: Vector/SynthRacks rails use M2.5, others use M3.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
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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M2.5 x 6mm Laptop Motherboard Replacement Screws Wafer Head 10-Pack Black
$4.99 -
10x M2.5 x 6mm Phillips Screws for Lenovo ThinkPad X131e Chromebook LCD Hinge
$4.99
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M2.5 x 8mm Screws for Retevis RT27 Radio Belt Clip 10-Pack Black Phillips
$4.99 -
M2.5 x 8mm Screws for Raspberry Pi 5 Case and PoE HAT 10-Pack Black
$4.99 -
ASUS ROG Strix G15 G513R Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
$0.10Choose size
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ASUS ROG Strix G17 G713 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
$0.10Choose size
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25x M2.5 x 8mm Phillips Screws for Acer Nitro 5 LCD Hinge Assembly
$5.99 -
M2.5 x 8mm Black Wafer Head Screws for Lenovo ThinkPad X131e Chromebook Palmrest Replacement – 10-Pack Black
$4.99Choose size
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Devices whose records share a thread with Eurorack module-to-rail mounting screws (Vector/SynthRacks rails), closest length match first.
- ASUS Chromebox 4 (CN66) also M2.5 × 6 mm
- D-series audio rack panel screw kit also M2.5 × 8 mm
- Eurorack synth module panels (Befaco Knurlies) also M2.5 × 7 mm
- Wurth Elektronik WA-SSTIE steel spacer stud also M2.5 × 6–8 mm
- Wurth Elektronik WA-SPAIE plastic spacer stud also M2.5 × 6–8 mm
- Lenovo IdeaPad also M2.5 × 6 mm
- IPETRONIK M-SENS2 sensor module mounting bracket also M2.5 × 6 mm
- HP Pavilion also M2.5 × 6 mm
Questions about Eurorack module-to-rail mounting screws (Vector/SynthRacks rails) screws
- What size screw does Eurorack module-to-rail mounting screws (Vector/SynthRacks rails) use?
- M2.5 × 6–8 mm for 'The threaded rails or nuts are made to receive either M2.5 or M3 machine screws... You will need M2.5 x 6mm to fix the modules or M2.5 x 8mm if a washer is used'.
- How long are the screws in Eurorack module-to-rail mounting screws (Vector/SynthRacks rails)?
- The records range from 6 to 8 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M2.5 screw?
- 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
- What screwdriver do I need for Eurorack module-to-rail mounting screws (Vector/SynthRacks rails)?
- The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.
- Can I use an imperial screw instead of M2.5?
- No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Eurorack module-to-rail mounting screws (Vector/SynthRacks rails)?
- TechSpareWarehouse (our own store) lists M2.5 x 6mm and M2.5 x 8mm, which match lengths in the records above.