GoPro HERO action-camera mount thumbscrew/buckle system screw size
M5 · 18 to 19 mm long
If you are replacing a screw on GoPro HERO action-camera mount thumbscrew/buckle system, the thread is M5 in lengths from 18 to 19 mm.
There are 2 separate fitment records for it, including independent screw-size research and forum measurement both state the GoPro mount thumbscre (M5) and second independent source measuring the thumbscrew confirms 'M5-0.8' thread and matching M (M5).
Head and drive, as the sources state them: thumb screw (knurled) head.
0 of the 2 records are marked confirmed, drawn from 2 sources (storytellertech.com and airsoftspecops.com).
An M5 screw is 5 mm in diameter with a 0.8 mm pitch, tapped with a 4.2 mm drill; imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
GoPro HERO action-camera mount thumbscrew/buckle system 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 |
|---|---|---|---|---|---|---|
| M5 | 18–19 mm | 0.8 mm | Thumb screw (knurled) | not stated | Independent screw-size research and forum measurement both state the GoPro mount thumbscrew is 'M5 bolt x 0.8' thread, used in the standard two-prong GoPro buckle mount | Reported |
| M5 | 18 mm | 0.8 mm | Thumb screw (knurled) | not stated | Second independent source measuring the thumbscrew confirms 'M5-0.8' thread and matching M5-0.8 nut for the GoPro mount buckle | Reported |
Fitment records and sources
Independent screw-size research and forum measurement both state the GoPro mount thumbscrew is 'M5 bolt x 0.8' thread, used in the standard two-prong GoPro buckle mount
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
Second independent source measuring the thumbscrew confirms 'M5-0.8' thread and matching M5-0.8 nut for the GoPro mount buckle
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Camera and optics hardware often uses short screws into thin threaded plates, so check engagement before tightening fully.
- Diameter: across the threads an M5 screw measures about 5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.8 mm from one thread crest to the next (12.5 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: for thumb screw (knurled) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The records span 18–19 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M5 heads take PH2 for Phillips and T25 for Torx, and a 4 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 M5 is about 4.0-6.0 N·m into metal threads and 1.5-2.5 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M5
- GoPro also uses M5 for its classic two-prong mount thumbscrew and buckle system, while smaller GoPro chassis screws are commonly Torx-driven without a confirmed metric thread in available sources — don't conflate the mount thumbscrew size with internal chassis screws.
- The GoPro thumbscrew is often mistaken for an imperial 10-32 thread, but it is an M5 x 0.8 metric thread.
More in Cameras & Optics
The same screw also fits
Devices whose records share a thread with GoPro HERO action-camera mount thumbscrew/buckle system, closest length match first.
- GoPro (all standard mounts, Hero series) also M5 × 18.5 mm
- GoPro HERO mount thumbscrew also M5 × 18–19 mm
- GoPro thumbscrew/nut (scope mount project) also M5 × 18 mm
- GoPro Universal Car Mounts also M5 × 18.5–19 mm
- Bicycle stem faceplate bolts also M5 × 18 mm
- Rexel S16 paper shredder also M5 × 18–19 mm
- Dryer door handle also M5 × 18–19 mm
- CNC router spindle clamp also M5 × 18–19 mm
Questions about GoPro HERO action-camera mount thumbscrew/buckle system screws
- What size screw does GoPro HERO action-camera mount thumbscrew/buckle system use?
- M5 × 18–19 mm for independent screw-size research and forum measurement both state the GoPro mount thumbscrew is 'M5 bolt x 0.8' thread, used in the standard two-prong GoPro buckle mount; M5 × 18 mm for second independent source measuring the thumbscrew confirms 'M5-0.8' thread and matching M5-0.8 nut for the GoPro mount buckle.
- How long are the screws in GoPro HERO action-camera mount thumbscrew/buckle system?
- The records range from 18 to 19 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M5 screw?
- 0.8 mm (coarse), which is the standard pitch for M5 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 4.2 mm and the normal clearance hole is 5.5 mm.
- What screwdriver do I need for GoPro HERO action-camera mount thumbscrew/buckle system?
- The sources do not name the drive. For M5, Phillips heads normally take PH2 and Torx heads T25; socket heads take a 4 mm hex key.
- Can I use an imperial screw instead of M5?
- No. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing. Use a true M5 screw so it does not cross-thread or strip the hole.