Tait Orca mobile radio vehicle kit (fleet trucks/buses) screw size
M5 · 20 mm long
Tait Orca mobile radio vehicle kit (fleet trucks/buses) takes M5 metric screws, 20 mm long.
Where it is used: four socket-head cap screws with spring washers and nuts secure the radio holder.
Head and drive, as the source states them: socket cap head.
This entry is marked confirmed and comes from manuals.repeater-builder.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.
Tait Orca mobile radio vehicle kit (fleet trucks/buses) 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 | 20 mm | 0.8 mm | Socket cap | not stated | Four socket-head cap screws with spring washers and nuts secure the radio holderwasher / flange face | Confirmed |
Fitment records and sources
Four socket-head cap screws with spring washers and nuts secure the radio holder
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: for socket cap screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 20 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
- Wheelchair and mobility OEM screws specify an exact standard and strength class (ISO 7045 CL4.8, ISO 4762 CL12.9). Matching only the thread size can cause a failure under load.
- 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 Tait Orca mobile radio vehicle kit (fleet trucks/buses), closest length match first.
- Bosch e-bike frame battery holder also M5 × 20 mm
- Bicycle water bottle cage mounts also M5 × 20 mm
- Bar-end plug or bar-end shifter also M5 × 20 mm
- Kick scooter clamp and folding hardware also M5 × 20 mm
- Motorcycle fairing bolts also M5 × 20 mm
- SPD-SL / Look 3-hole cycling cleats also M5 × 20 mm
- Triumph Thruxton handlebar riser and instrument panel also M5 × 20 mm
- Stem faceplate bolts also M5 × 20 mm
Questions about Tait Orca mobile radio vehicle kit (fleet trucks/buses) screws
- What size screw does Tait Orca mobile radio vehicle kit (fleet trucks/buses) use?
- M5 × 20 mm for four socket-head cap screws with spring washers and nuts secure the radio holder.
- How long are the screws in Tait Orca mobile radio vehicle kit (fleet trucks/buses)?
- The record gives 20 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 Tait Orca mobile radio vehicle kit (fleet trucks/buses)?
- 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.