Alpine Head Units screw size
M5 · length not stated in the sources
Alpine Head Units takes M5 metric screws. None of the sources we found gives an exact length, so measure the original before you order.
It is listed for mounting bolts used for ISO mounting in vehicles like the Honda Accord.
This entry is marked confirmed and comes from diymobileaudio.com.
M5 means a 5 mm nominal diameter with a 0.8 mm thread pitch. Imperial look-alike: #10-32 (4.83 mm) — the other common rack thread; check before mixing.
Alpine Head Units 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 | not stated | 0.8 mm | not stated | not stated | Mounting bolts used for ISO mounting in vehicles like the Honda Accord | Confirmed |
Fitment records and sources
Mounting bolts used for ISO mounting in vehicles like the Honda Accord.
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Where the manufacturer publishes a torque value, use a torque driver rather than feel.
- 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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- 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
- Truss and stage-light clamps use M8 or M10 bolts depending on tube diameter — larger than anything in this database, so don't substitute an M6.
- Shimano SPD cleat bolts are widely sold as M5 x 8, but Shimano's own dealer manuals don't state the thread — check the old bolt.
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Devices whose records share a thread with Alpine Head Units, closest length match first.
- HIWIN QHH35 / QEH20 linear guideway end-cap/lubrication unit fixing screws also M5
- Bicycle water bottle cage bolts also M5
- Triumph Thruxton fairing side and bottom panels also M5
- SPD-SL / Look 3-hole cycling cleats also M5
- Motorcycle fairing bolts also M5
- Kick scooter clamp and folding hardware also M5
- Six-bolt disc brake rotor also M5
- Segway-Ninebot Max Pro 2.2 e-scooter stem also M5
Questions about Alpine Head Units screws
- What size screw does Alpine Head Units use?
- M5 for mounting bolts used for ISO mounting in vehicles like the Honda Accord.
- How long are the screws in Alpine Head Units?
- None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
- 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 Alpine Head Units?
- 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.