Aimpoint Comp M4 / M4s LRP & TNP mount screw size
M5 · 15 mm long
Aimpoint Comp M4 / M4s LRP & TNP mount takes M5 metric screws, 15 mm long.
Where it is used: aimpoint OEM spare part: Screw M5 x 15, 2 pieces, for Comp M4 / M4s mount.
This entry is marked confirmed and comes from aimpoint.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.
Aimpoint Comp M4 / M4s LRP & TNP mount 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 | 15 mm | 0.8 mm | not stated | not stated | Aimpoint OEM spare part: Screw M5 x 15, 2 pieces, for Comp M4 / M4s mount | Confirmed |
Fitment records and sources
Aimpoint OEM spare part: Screw M5 x 15, 2 pieces, for Comp M4 / M4s mount.
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Do not confuse metric mounting screws with the 1/4-20 or 3/8-16 tripod threads that cameras and clamps also carry.
- 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.
- The record states 15 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- 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
- M5x0.8 is the de facto universal bike thread — confirm 0.8mm pitch before threading into carbon or alloy bosses.
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Devices whose records share a thread with Aimpoint Comp M4 / M4s LRP & TNP mount, closest length match first.
- Wheelchair rear wheel axle bolts also M5 × 15 mm
- 19-inch rack cage nut (mid size) also M5 × 15 mm
- Large / industrial drones also M5 × 15 mm
- Bicycle bottle cage bosses (near universal) also M5 × 15 mm
- Panasonic TC-L42E60 also M5 × 15 mm
- Ski binding insert flat-head screw kit also M5 × 15 mm
- Treadmill console mounts also M5 × 15 mm
- X-Carve / Shapeoko-style OpenBuilds clone kits also M5 × 15 mm
Questions about Aimpoint Comp M4 / M4s LRP & TNP mount screws
- What size screw does Aimpoint Comp M4 / M4s LRP & TNP mount use?
- M5 × 15 mm for aimpoint OEM spare part: Screw M5 x 15, 2 pieces, for Comp M4 / M4s mount.
- How long are the screws in Aimpoint Comp M4 / M4s LRP & TNP mount?
- The record gives 15 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Aimpoint Comp M4 / M4s LRP & TNP mount?
- 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.