How long are the screws in FPV flight controller stack 30.5x30.5mm?

The records range from 7 to 16 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 FPV flight controller stack 30.5x30.5mm?

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 FPV flight controller stack 30.5x30.5mm?

TechSpareWarehouse (our own store) lists M3 x 8mm, M3 x 10mm and M3 x 12mm, which match lengths in the records above.

FPV flight controller stack 30.5x30.5mm screw size

M3 · 7 to 16 mm long

Our records put FPV flight controller stack 30.5x30.5mm on M3 screws in lengths from 7 to 16 mm.

It is listed for M3 anti-vibration standoff screw (M3x7+4.5) for F3/F4/F7 stacks.

This entry is marked confirmed and comes from upgraderc.be.

An M3 screw is 3 mm in diameter with a 0.5 mm pitch, tapped with a 2.5 mm drill; imperial look-alike: #5-40 (3.18 mm) or #4-40 — neither interchanges with M3.

FPV flight controller stack 30.5x30.5mm 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	7–16 mm	0.5 mm	not stated	not stated	M3 anti-vibration standoff screw (M3x7+4.5) for F3/F4/F7 stacks	Confirmed

Fitment records and sources

M37-16mmconfirmed

M3 anti-vibration standoff screw (M3x7+4.5) for F3/F4/F7 stacks

pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10

Source

How to check the screw before you buy

Frame and motor screws must not reach the motor windings; check the length against the motor's mounting depth.
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 7–16 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

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.
Motherboard screws must not poke past the standoff and touch traces on the back of the board.

Pitch gauge · Screw size finder · Torque guide

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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The same screw also fits

Devices whose records share a thread with FPV flight controller stack 30.5x30.5mm, closest length match first.

FPV drone motors (5-inch class) also M3 × 7–8 mm
RC brushless motor mounts also M3 × 8–16 mm
ALware Quad Flyer Spider 500 quadcopter kit also M3 × 7–8 mm
PyroDrone anti-vibration FC standoffs also M3 × 7 mm
TBS Source One V3 / HD FPV frame also M3 × 7–16 mm
REV Robotics T-slot extrusion screw (41-1907) also M3 × 8 mm
DJI Agras Agras T50/T25/T16/T20/T30 and FlyCart 30 airframe screw also M3 × 8 mm
5-inch brushless motor to arm also M3 × 7–8 mm

Questions about FPV flight controller stack 30.5x30.5mm screws

What size screw does FPV flight controller stack 30.5x30.5mm use?: M3 × 7–16 mm for M3 anti-vibration standoff screw (M3x7+4.5) for F3/F4/F7 stacks.
How long are the screws in FPV flight controller stack 30.5x30.5mm?: The records range from 7 to 16 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 FPV flight controller stack 30.5x30.5mm?: 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 FPV flight controller stack 30.5x30.5mm?: TechSpareWarehouse (our own store) lists M3 x 8mm, M3 x 10mm and M3 x 12mm, which match lengths in the records above.

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