What size screw does RC micro helicopters use?

M1.6 × 2–5 mm for frame and linkage hardware in bulk metric kits.

How long are the screws in RC micro helicopters?

The records range from 2 to 5 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M1.6 screw?

0.35 mm (coarse), which is the standard pitch for M1.6 machine screws; a 0.2 mm fine pitch exists but is uncommon. The tap drill is 1.25 mm and the normal clearance hole is 1.8 mm.

What screwdriver do I need for RC micro helicopters?

The sources do not name the drive. For M1.6, Phillips heads normally take PH00 and Torx heads T4–T5; socket heads take a 1.5 mm hex key.

Can I use an imperial screw instead of M1.6?

No. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent. Use a true M1.6 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for RC micro helicopters?

TechSpareWarehouse (our own store) lists M1.6 x 3mm and M1.6 x 4mm, which match lengths in the records above.

RC micro helicopters screw size

M1.6 · 2 to 5 mm long

The screws used on RC micro helicopters are M1.6 in lengths from 2 to 5 mm.

It is listed for frame and linkage hardware in bulk metric kits.

This entry is marked reported and comes from rcscrewz.com.

M1.6 means a 1.6 mm nominal diameter with a 0.35 mm thread pitch. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.

RC micro helicopters 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
M1.6	2–5 mm	0.35 mm	not stated	not stated	frame and linkage hardware in bulk metric kits	Reported

Fitment records and sources

M1.62-5mmreported

frame and linkage hardware in bulk metric kits

pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5

Source

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 M1.6 screw measures about 1.6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.35 mm from one thread crest to the next (28.57 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 2–5 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M1.6 heads take PH00 for Phillips and T4–T5 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 M1.6 is about 12-20 N·cm into metal threads and 6-10 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M1.6

M1.6 is the most common laptop-internal micro screw after M2 — Dell XPS keyboards specifically call out M1.6 x 1.5mm, and generic M2 substitutes strip the bracket.

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 RC micro helicopters, closest length match first.

BETAFPV Meteor/Air series tiny-whoop motor screws also M1.6 × 4 mm
Micro drone frame arms also M1.6 × 5 mm
DJI O3 Air Unit also M1.6 × 5 mm
BetaFPV whoop motor screws (larger variant) also M1.6 × 4 mm
BETAFPV Meteor whoops (alt size) also M1.6 × 4 mm
Eyeglass hinge repair screw (Tabco SM106) also M1.6 × 5 mm
Dell Precision 5480 also M1.6 × 2 mm
Lenovo ThinkPad P16 Gen 1 also M1.6 × 2.1 mm

Questions about RC micro helicopters screws

What size screw does RC micro helicopters use?: M1.6 × 2–5 mm for frame and linkage hardware in bulk metric kits.
How long are the screws in RC micro helicopters?: The records range from 2 to 5 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M1.6 screw?: 0.35 mm (coarse), which is the standard pitch for M1.6 machine screws; a 0.2 mm fine pitch exists but is uncommon. The tap drill is 1.25 mm and the normal clearance hole is 1.8 mm.
What screwdriver do I need for RC micro helicopters?: The sources do not name the drive. For M1.6, Phillips heads normally take PH00 and Torx heads T4–T5; socket heads take a 1.5 mm hex key.
Can I use an imperial screw instead of M1.6?: No. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent. Use a true M1.6 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for RC micro helicopters?: TechSpareWarehouse (our own store) lists M1.6 x 3mm and M1.6 x 4mm, which match lengths in the records above.

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