What size screw does Buffalo WZR-300HP router use?

M3 × 8–12 mm for enclosure assembly screws.

How long are the screws in Buffalo WZR-300HP router?

The records range from 8 to 12 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 Buffalo WZR-300HP router?

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 Buffalo WZR-300HP router?

TechSpareWarehouse (our own store) lists M3 x 8mm, M3 x 10mm and M3 x 12mm, which match lengths in the records above.

Buffalo WZR-300HP router screw size

M3 · 8 to 12 mm long

The screws used on Buffalo WZR-300HP router are M3 in lengths from 8 to 12 mm.

The record covers enclosure assembly screws.

This entry is marked reported and comes from ifixit.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.

Buffalo WZR-300HP router 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	8–12 mm	0.5 mm	not stated	not stated	Enclosure assembly screws	Reported

Fitment records and sources

M38-12mmreported

Enclosure assembly 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

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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
The records span 8–12 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard 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

Pond/aquarium equipment manuals aimed at consumers rarely specify exact thread pitch or length for internal fasteners, since these are considered non-user-serviceable; distributor-level assembly/service manuals (e.g., Maytronics internal documents) are a better source than end-user guides.
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 Buffalo WZR-300HP router, closest length match first.

NVG bracket mount screw set (tactical helmet) also M3 × 8–12 mm
Eurorack synthesiser case (Intellijel 7U Performance Case Gen 2) also M3 × 8 mm
Instrument enclosure base/rear panel screws (Metcase Technomet-Control rack case) also M3 × 8 mm
Wurth Elektronik WA-SSTIE steel spacer stud also M3 × 8–12 mm
MikroTik RouterBoard case also M3 × 8–12 mm
Essentra MTNSP-M3-10-3 male-to-male standoff also M3 × 10 mm
Netgear Nighthawk AX8 router also M3 × 8–10 mm
Portable medical device enclosure also M3 × 8–12 mm

Questions about Buffalo WZR-300HP router screws

What size screw does Buffalo WZR-300HP router use?: M3 × 8–12 mm for enclosure assembly screws.
How long are the screws in Buffalo WZR-300HP router?: The records range from 8 to 12 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 Buffalo WZR-300HP router?: 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 Buffalo WZR-300HP router?: TechSpareWarehouse (our own store) lists M3 x 8mm, M3 x 10mm and M3 x 12mm, which match lengths in the records above.

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