Vivotek IT9389-H / IT9389-HT dome camera screw size
M3 · 8 mm long
Our records put Vivotek IT9389-H / IT9389-HT dome camera on M3 screws, 8 mm long.
It is listed for camera-to-bracket screws on the AM-21M mount, M3x8.
This entry is marked confirmed and comes from vivotek.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.
Vivotek IT9389-H / IT9389-HT dome camera 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 | 8 mm | 0.5 mm | not stated | not stated | Camera-to-bracket screws on the AM-21M mount, M3x8 | Confirmed |
Fitment records and sources
Camera-to-bracket screws on the AM-21M mount, M3x8
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 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 record states 8 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 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
- Camera tripod and Arca threads are imperial 1/4-20 and 3/8-16, never M3.
- Camera and tripod mounting threads themselves are imperial 1/4in-20 or 3/8in-16 — the metric M2-M4 screws in rig kits are only for the accessory hardware, not the tripod mount.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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M3 x 8mm Phillips Wafer Head Screw for SLA Resin 3D Printer VAT Film - Single Replacement Black
$0.10 each · min. 50
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M3 x 8mm Phillips Flat Head Countersunk Machine Screws Zinc Silver 100-Pack for RC & 3D Printers
$9.99 -
M3 x 8mm Phillips Flat Head Countersunk Machine Screws Zinc Silver 10-Pack for RC & 3D Printers
$4.99
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Devices whose records share a thread with Vivotek IT9389-H / IT9389-HT dome camera, closest length match first.
- OpenFlexure Microscope AMS translation stage also M3 × 8 mm
- Airsoft/firearm red-dot sight optic mounting screws (Vortex Viper, Swampfox patterns) also M3 × 8 mm
- Glock MOS cover plate screw also M3 × 8 mm
- Refrigerator light cover and shelf clips also M3 × 8 mm
- OpenFlexure Delta Stage also M3 × 8 mm
- Vintage camera / electronics faceplates also M3 × 8 mm
- Microscope objective turret and stage also M3 × 8 mm
- Telescope thumb screws for diagonals, adapters and focusers also M3 × 8 mm
Questions about Vivotek IT9389-H / IT9389-HT dome camera screws
- What size screw does Vivotek IT9389-H / IT9389-HT dome camera use?
- M3 × 8 mm for camera-to-bracket screws on the AM-21M mount, M3x8.
- How long are the screws in Vivotek IT9389-H / IT9389-HT dome camera?
- The record gives 8 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Vivotek IT9389-H / IT9389-HT dome camera?
- 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.
- Where can I buy replacement screws for Vivotek IT9389-H / IT9389-HT dome camera?
- TechSpareWarehouse (our own store) lists M3 x 8mm, which matches the length in the records above.