What size screw does Eurorack module to rack rail use?

M3 × 6 mm for the standard Doepfer-style faceplate screw.

How long are the screws in Eurorack module to rack rail?

The record gives 6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.

What is the thread pitch of an M3 screw?

0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.

What screwdriver do I need for Eurorack module to rack rail?

The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.

Can I use an imperial screw instead of M3?

No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Eurorack module to rack rail?

TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.

Eurorack module to rack rail screw size

M3 · 6 mm long

Our records put Eurorack module to rack rail on M3 screws, 6 mm long.

It is listed for the standard Doepfer-style faceplate screw.

This entry is marked confirmed and comes from patchpierre.blogspot.com.

An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

Eurorack module to rack rail 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
M3	6 mm	0.5 mm	not stated	not stated	the standard Doepfer-style faceplate screw	Confirmed

Fitment records and sources

M36mmconfirmed

the standard Doepfer-style faceplate screw

pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10

Source

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 M3 screw measures about 3 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.5 mm from one thread crest to the next (20 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 record states 6 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
Driver: the source does not name the drive. Standard M3 heads take PH1 for Phillips and T10 for Torx, and a 2.5 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 M3 is about 80-130 N·cm into metal threads and 35-60 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M3

Eurorack is a strong known case with two competing metric standards (M2.5 for Vector rails, M3 for Schroff/DIN-style and 3U threaded rails); mixing rail types requires matching screw/nut thread.
Eurorack rail thread varies by manufacturer: some tapped M2.5, some M3 — not a single universal standard.

Pitch gauge · Screw size finder · Torque guide

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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The same screw also fits

Devices whose records share a thread with Eurorack module to rack rail, closest length match first.

ICY DOCK MB344SP FLEX-FIT Quattro 5.25" bay enclosure also M3 × 6 mm
UniFi switch / access point wall bracket also M3 × 6 mm
Tektronix RM5 rackmount kit (5/6 Series MSO) also M3 × 6 mm
GCX Barcode Scanner Adapter mounting kit also M3 × 6 mm
cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M3 × 6 mm
Rack blanking panels and front handles also M3 × 6 mm
Takachi EM-series enclosure PCB bosses also M3 × 6 mm
Eurorack module panel mounting also M3 × 6 mm

Questions about Eurorack module to rack rail screws

What size screw does Eurorack module to rack rail use?: M3 × 6 mm for the standard Doepfer-style faceplate screw.
How long are the screws in Eurorack module to rack rail?: The record gives 6 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
What is the thread pitch of an M3 screw?: 0.5 mm (coarse), which is the standard pitch for M3 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.5 mm and the normal clearance hole is 3.4 mm.
What screwdriver do I need for Eurorack module to rack rail?: The sources do not name the drive. For M3, Phillips heads normally take PH1 and Torx heads T10; socket heads take a 2.5 mm hex key.
Can I use an imperial screw instead of M3?: No. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3. Use a true M3 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Eurorack module to rack rail?: TechSpareWarehouse (our own store) lists M3 x 6mm, which matches the length in the records above.

Heads up: shipping delay