What size screw does FPV flight controller stack 20x20mm use?

M2 × 7–16 mm for smaller stacks use M2 anti-vibration grommet screws.

How long are the screws in FPV flight controller stack 20x20mm?

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 M2 screw?

0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.

What screwdriver do I need for FPV flight controller stack 20x20mm?

The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.

Can I use an imperial screw instead of M2?

No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for FPV flight controller stack 20x20mm?

TechSpareWarehouse (our own store) lists M2 x 8mm, which matches the length in the records above.

FPV flight controller stack 20x20mm screw size

M2 · 7 to 16 mm long

FPV flight controller stack 20x20mm takes M2 metric screws in lengths from 7 to 16 mm.

The record covers smaller stacks use M2 anti-vibration grommet screws.

This entry is marked reported and comes from mepsking.shop.

An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.

FPV flight controller stack 20x20mm 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
M2	7–16 mm	0.4 mm	not stated	not stated	Smaller stacks use M2 anti-vibration grommet screws	Reported

Fitment records and sources

M27-16mmreported

Smaller stacks use M2 anti-vibration grommet screws

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

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 M2 screw measures about 2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.4 mm from one thread crest to the next (25 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 M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 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 M2 is about 25-40 N·cm into metal threads and 12-20 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M2

Drone kits mix M2 (motors) and M2.5 (stack) in the same bag — easy to grab the wrong one.
M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.

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 20x20mm, closest length match first.

Vintage radio chassis and dial screws also M2 × 7–10 mm
FPV freestyle frames (Djinn F25 SP) also M2 × 7–12 mm
Arcade marquee retainers also M2 × 7–10 mm
Axial SCX10 III RC crawler chassis also M2 × 7–14 mm
E-flite Gee Bee R-2 wing connector screws also M2 × 8 mm
RC model servo mounting also M2 × 7–10 mm
ALware Quad Flyer Spider 500 quadcopter kit also M2 × 7–8 mm
E-flite Gee Bee R-2 wing connector also M2 × 8 mm

Questions about FPV flight controller stack 20x20mm screws

What size screw does FPV flight controller stack 20x20mm use?: M2 × 7–16 mm for smaller stacks use M2 anti-vibration grommet screws.
How long are the screws in FPV flight controller stack 20x20mm?: 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 M2 screw?: 0.4 mm (coarse), which is the standard pitch for M2 machine screws; a 0.25 mm fine pitch exists but is uncommon. The tap drill is 1.6 mm and the normal clearance hole is 2.4 mm.
What screwdriver do I need for FPV flight controller stack 20x20mm?: The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take a 1.5 mm hex key.
Can I use an imperial screw instead of M2?: No. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable. Use a true M2 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for FPV flight controller stack 20x20mm?: TechSpareWarehouse (our own store) lists M2 x 8mm, which matches the length in the records above.

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