What size screw does Drone motors (2205-2306 class) use?

M3 × 5–8 mm for standard motor mounting bolt pattern for 5in-class quads.

How long are the screws in Drone motors (2205-2306 class)?

The records range from 5 to 8 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 Drone motors (2205-2306 class)?

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 Drone motors (2205-2306 class)?

TechSpareWarehouse (our own store) lists M3 x 5mm, M3 x 6mm and M3 x 8mm, which match lengths in the records above.

Drone motors (2205-2306 class) screw size

M3 · 5 to 8 mm long

Drone motors (2205-2306 class) takes M3 metric screws in lengths from 5 to 8 mm.

Where it is used: standard motor mounting bolt pattern for 5in-class quads.

This entry is marked confirmed and comes from en.wikipedia.org.

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.

Drone motors (2205-2306 class) 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	5–8 mm	0.5 mm	not stated	not stated	standard motor mounting bolt pattern for 5in-class quads	Confirmed

Fitment records and sources

M35-8mm by arm thicknessconfirmed

standard motor mounting bolt pattern for 5in-class quads

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 5–8 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

On FPV motors, screw length is safety-critical: one turn too long and the screw crushes the motor windings. Measure arm + base depth, and dry-fit before powering up.
M3 is the most common FPV screw, but length must match arm and stack thickness — too long can short motor windings or crack frame plates.

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 Drone motors (2205-2306 class), closest length match first.

ImpulseRC Apex EVO FPV frame also M3 × 6–8 mm
Drone frame arms also M3 × 8 mm
Pinball playfield insert hardware (metric) also M3 × 6–8 mm
HP LaserJet family common hardware also M3 × 5–8 mm
iFlight XING R5 2207 motor also M3 × 6–8 mm
DJI Phantom 2 landing gear/support stand mounting screw also M3 × 6.5 mm
Tamiya TG10-Mk.2 chassis (RC touring/on-road) also M3 × 6 mm
Futaba standard servo horn screw also M3 × 8 mm

Questions about Drone motors (2205-2306 class) screws

What size screw does Drone motors (2205-2306 class) use?: M3 × 5–8 mm for standard motor mounting bolt pattern for 5in-class quads.
How long are the screws in Drone motors (2205-2306 class)?: The records range from 5 to 8 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 Drone motors (2205-2306 class)?: 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 Drone motors (2205-2306 class)?: TechSpareWarehouse (our own store) lists M3 x 5mm, M3 x 6mm and M3 x 8mm, which match lengths in the records above.

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