How long are the screws in ISO 7380 button head, small assemblies?

The records range from 6 to 16 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 ISO 7380 button head, small assemblies?

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 ISO 7380 button head, small assemblies?

TechSpareWarehouse (our own store) lists M3 x 6mm, M3 x 8mm and M3 x 10mm, which match lengths in the records above.

ISO 7380 button head, small assemblies screw size

M3 · 6 to 16 mm long

The screws used on ISO 7380 button head, small assemblies are M3 in lengths from 6 to 16 mm.

Where it is used: M3 button heads widely used in enclosures and extrusion frames.

Head and drive, as the source states them: button head.

This entry is marked reported and comes from westfieldfasteners.co.uk.

For reference, M3 is 3 mm across the threads at 0.5 mm pitch. The imperial size people confuse it with: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

ISO 7380 button head, small assemblies 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	6–16 mm	0.5 mm	Button head	not stated	M3 button heads widely used in enclosures and extrusion frames	Reported

Fitment records and sources

M36-16mmreported

M3 button heads widely used in enclosures and extrusion frames

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

Source

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 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: for button head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
The records span 6–16 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

2020 extrusion T-nuts come in M3/M4/M5 and are not interchangeable — M3 is accessory-only, M5 is structural.
M3 (3.0mm, 0.5mm pitch) is not #6-32 UNC (~3.5mm) — they look identical and cross-thread, the single most common PC-building mistake.

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 ISO 7380 button head, small assemblies, closest length match first.

DAS / NAS enclosure chassis also M3 × 6–10 mm
Portable medical device enclosure also M3 × 6–12 mm
Netgear Nighthawk AX8 router also M3 × 6–10 mm
Verifone M400 payment terminal rear locking bracket access cover also M3 × 8 mm
PCIe slot covers & rear brackets also M3 × 6 mm
Desktop switch rack-ear kits also M3 × 6–8 mm
GCX barcode scanner adapter kit (scanner-to-bracket) also M3 × 8 mm
Wurth Elektronik WA-SPAIE plastic spacer stud also M3 × 6–16 mm

Questions about ISO 7380 button head, small assemblies screws

What size screw does ISO 7380 button head, small assemblies use?: M3 × 6–16 mm for M3 button heads widely used in enclosures and extrusion frames.
How long are the screws in ISO 7380 button head, small assemblies?: The records range from 6 to 16 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 ISO 7380 button head, small assemblies?: 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 ISO 7380 button head, small assemblies?: TechSpareWarehouse (our own store) lists M3 x 6mm, M3 x 8mm and M3 x 10mm, which match lengths in the records above.

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