Smart home sensor brackets screw size
M3 · 6 to 10 mm long
Our records put Smart home sensor brackets on M3 screws in lengths from 6 to 10 mm.
It is listed for motion and contact sensor mounting brackets.
This entry is marked reported.
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.
Smart home sensor brackets 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 | 6–10 mm | 0.5 mm | not stated | not stated | Motion and contact sensor mounting brackets | Reported |
Fitment records and sources
Motion and contact sensor mounting brackets
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Over-long screws in phones are a known cause of damaged boards (Apple's 'long screw damage'), so never swap positions.
- 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 records span 6–10 mm, which means different positions take different lengths — match each hole to its own screw.
- 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
- Grub screws (set screws) on sensor retainers are frequently M3 even when the surrounding housing uses M4/M5 fasteners — don't assume one thread size for a whole enclosure.
- Many gas-detector and sensor manuals only give a torque spec (e.g. '0.5 N·m max') without repeating the thread size at every mention — the explicit M3 callout is usually only in the accessories/spare-parts table, not the main installation steps.
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 6mm Replacement Screws for XLR Audio Connectors Phillips Wafer Head 50-Pack
$4.99 -
M3 x 6mm Phillips Wafer Head Carbon Steel Machine Screws for XLR Audio Connectors | 50-Pack (Black)
$4.99
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M3 x 8mm Screws for Leather Spike Attachments Guitar Straps 10-Pack
$4.99 -
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 10mm Phillips Wafer Head Screw for Sim Racing Wheel Paddle Shifter - Single Replacement Black
$0.10 each · min. 50
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M3 x 10mm Phillips Wafer Head Screw for RC Car/Truck Chassis Mount - Single Replacement Black
$0.10 each · min. 50
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M3 x 6mm Phillips Wafer Head Screw for 3D Printer Frame Assembly - Single Replacement Black
$0.10 each · min. 50
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M3 x 6mm Phillips Wafer Head Screw for Boutique Guitar Pedal Enclosure - Single Replacement Black
$0.10 each · min. 50
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Devices whose records share a thread with Smart home sensor brackets, closest length match first.
- Xbox Series S internal chassis also M3 × 8–10 mm
- Akuvox A08 video doorbell (back plate) also M3 × 6 mm
- PlayStation 5 disc drive and shell also M3 × 6–10 mm
- Xbox Series X PSU bracket also M3 × 8–10 mm
- Video doorbell lens bezel also M3 × 6 mm
- Creality Ender 3 (non-frame parts) also M3 × 6–10 mm
- COSEL power supply terminal block (used in industrial/pump/water-treatment control panels) also M3 × 6–8 mm
- Keystone stainless hex standoff (P/N 24295) also M3 × 10 mm
Questions about Smart home sensor brackets screws
- What size screw does Smart home sensor brackets use?
- M3 × 6–10 mm for motion and contact sensor mounting brackets.
- How long are the screws in Smart home sensor brackets?
- The records range from 6 to 10 mm depending on the position, so match each screw to its own hole.
- 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 Smart home sensor brackets?
- 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 Smart home sensor brackets?
- TechSpareWarehouse (our own store) lists M3 x 6mm, M3 x 8mm and M3 x 10mm, which match lengths in the records above.