PyroDrone anti-vibration FC standoffs screw size
M3 · 7 mm long
If you are replacing a screw on PyroDrone anti-vibration FC standoffs, the thread is M3, 7 mm long.
The record covers M3 x 7mm standoffs with 4.5mm rubber damper mounting flight controller to frame.
This entry is marked confirmed and comes from pyrodrone.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.
PyroDrone anti-vibration FC standoffs 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 | 7 mm | 0.5 mm | not stated | not stated | M3 x 7mm standoffs with 4.5mm rubber damper mounting flight controller to frame | Confirmed |
Fitment records and sources
M3 x 7mm standoffs with 4.5mm rubber damper mounting flight controller to frame
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- Vibration loosens small screws on drones and RC models, so builders commonly add a drop of medium (blue) threadlocker on metal-to-metal joints — never on plastic.
- 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 7 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
- Nylon M3 standoffs are for vibration isolation, not load-bearing frame arms.
- Intel's ATX and microATX specs never state a metric standoff thread; PC motherboard standoffs are usually imperial 6-32, and PC fan screws are commonly 6-32 self-tapping.
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Devices whose records share a thread with PyroDrone anti-vibration FC standoffs, closest length match first.
- ALware Quad Flyer Spider 500 quadcopter kit also M3 × 7 mm
- TBS Source One V3 / HD FPV frame also M3 × 7 mm
- FPV drone motors (5-inch class) also M3 × 7 mm
- FPV flight controller stack 30.5x30.5mm also M3 × 7 mm
- 5-inch brushless motor to arm also M3 × 7 mm
- 1/10 scale RC cars also M3 × 7 mm
- Pinball playfield insert hardware (metric) also M3 × 7 mm
- ImpulseRC Apex EVO FPV frame also M3 × 7 mm
Questions about PyroDrone anti-vibration FC standoffs screws
- What size screw does PyroDrone anti-vibration FC standoffs use?
- M3 × 7 mm for M3 x 7mm standoffs with 4.5mm rubber damper mounting flight controller to frame.
- How long are the screws in PyroDrone anti-vibration FC standoffs?
- The record gives 7 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 PyroDrone anti-vibration FC standoffs?
- 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.