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.

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 Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case)?

TechSpareWarehouse (our own store) lists M3 x 6mm and M3 x 8mm, which match lengths in the records above.

Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case) screw size

M3 · 6 to 8 mm long

Our records put Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case) on M3 screws in lengths from 6 to 8 mm.

Where it is used: parts list: 'ITEM 5, QTY 6, M3 x 6 mm CSK Screw Base Panel Screws' and 'ITEM 9, QTY 8, M3x8 Pan Screw Rear Panel Screws'.

Head and drive, as the source states them: flat / countersunk head.

This entry is marked confirmed and comes from metcase-co-uk-firewall.ccsecureportal.de.

M3 means a 3 mm nominal diameter with a 0.5 mm thread pitch. Imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case) 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	6–8 mm	0.5 mm	Flat / countersunk	not stated	Parts list: 'ITEM 5, QTY 6, M3 x 6 mm CSK Screw Base Panel Screws' and 'ITEM 9, QTY 8, M3x8 Pan Screw Rear Panel Screws'	Confirmed

Fitment records and sources

M36-8mmconfirmed

Parts list: 'ITEM 5, QTY 6, M3 x 6 mm CSK Screw Base Panel Screws' and 'ITEM 9, QTY 8, M3x8 Pan Screw Rear Panel Screws'

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: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
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 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

Trijicon RMR (#6-32) and RMRcc (#5-40) mounting screws are imperial, not M3, even though accessory sellers list them as M3.
Blender, toothbrush and shaver teardowns list Torx/Phillips bit sizes only; a T8 bit tells you nothing about the thread.

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.

More in Electronics, Racks & Enclosures

19-inch rack cage nut (light equipment)19-inch rack cage nut (metric square-hole rails)19-inch rack cage nut (mid size)19-inch rack cage nut and panel screw 19-inch rack network and AV gear 19-inch rack-mount audio/AV equipment 19-inch server racks 19in / 10in server rack cage nut and screw kit 19in equipment rack (Kendall Howard cage nuts)19in rack cage nuts (alternate metric)19in rack cage nuts (metric)1U rack-mount PDU (American Denki)

Browse all 357 in Electronics, Racks & Enclosures →

The same screw also fits

Devices whose records share a thread with Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case), closest length match first.

Eurorack synthesiser case (Intellijel 7U Performance Case Gen 2) also M3 × 6–8 mm
External 3.5in HDD enclosures also M3 × 6 mm
NVG bracket mount screw set (tactical helmet) also M3 × 8 mm
Buffalo WZR-300HP router also M3 × 8 mm
Wurth Elektronik WA-SSTIE steel spacer stud also M3 × 6–8 mm
MikroTik RouterBoard case also M3 × 6–8 mm
Elo E458992 EMV payment terminal mount kit also M3 × 8 mm
Creality Ender 3 (non-frame parts) also M3 × 6–8 mm

Questions about Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case) screws

What size screw does Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case) use?: M3 × 6–8 mm for parts list: 'ITEM 5, QTY 6, M3 x 6 mm CSK Screw Base Panel Screws' and 'ITEM 9, QTY 8, M3x8 Pan Screw Rear Panel Screws'.
How long are the screws in Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case)?: 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 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 Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case)?: 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 Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case)?: TechSpareWarehouse (our own store) lists M3 x 6mm and M3 x 8mm, which match lengths in the records above.

Heads up: shipping delay