PC case fan mounting screws (aftermarket kits) screw size
M3 · 25 to 30 mm long
The screws used on PC case fan mounting screws (aftermarket kits) are M3 in lengths from 25 to 30 mm.
The record covers amazon product listing for GCAMX Computer Case Fan Mount Screws explicitly lists 'Thread Size: M3' for fixing case/radiator fans.
This entry is marked confirmed and comes from amazon.com.
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.
PC case fan mounting screws (aftermarket kits) 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 | 25–30 mm | 0.5 mm | not stated | not stated | Amazon product listing for GCAMX Computer Case Fan Mount Screws explicitly lists 'Thread Size: M3' for fixing case/radiator fans | Confirmed |
Fitment records and sources
Amazon product listing for GCAMX Computer Case Fan Mount Screws explicitly lists 'Thread Size: M3' for fixing case/radiator fans.
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Laptop covers and brackets often mix two or three lengths of the same thread, so lay the screws out in the order they came out (a magnetic mat or a sheet of paper with the hole pattern drawn on it works).
- 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 25–30 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
- Suunto dive computer service manuals reference strap pins and battery compartment springs but do not explicitly cite a metric screw thread size in the sections reviewed; do not infer M2/M2.5 fitment for Suunto dive computer straps without direct confirmation.
- GoPro's own official Dive Housing user guide does not itself state a metric screw size for the housing body; only third-party accessory manufacturer (INON) manuals explicitly cite M6 screws for their add-on arms/adapters attaching to the housing.
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Devices whose records share a thread with PC case fan mounting screws (aftermarket kits), closest length match first.
- PC case & radiator fans also M3 × 25–30 mm
- PC case and radiator fan mounting also M3 × 25–30 mm
- PC case fan mounting (120/140mm) also M3 × 25–30 mm
- Pumpkin CubeSat Kit (PC/104 stack) also M3 × 25 mm
- PC watercooling radiator fan screws also M3 × 25–30 mm
- TBS Source One V3 / HD FPV frame also M3 × 25–30 mm
- Heated bed to Y-carriage also M3 × 25 mm
- Philips IntelliVue MP80/MP90 monitor also M3 × 25 mm
Questions about PC case fan mounting screws (aftermarket kits) screws
- What size screw does PC case fan mounting screws (aftermarket kits) use?
- M3 × 25–30 mm for amazon product listing for GCAMX Computer Case Fan Mount Screws explicitly lists 'Thread Size: M3' for fixing case/radiator fans.
- How long are the screws in PC case fan mounting screws (aftermarket kits)?
- The records range from 25 to 30 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 PC case fan mounting screws (aftermarket kits)?
- 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.