Futaba micro servo self-tapping screw screw size
M2 · 4 mm long
Futaba micro servo self-tapping screw takes M2 metric screws, 4 mm long.
It is listed for self-tapping mounting screw for micro-size servos.
This entry is marked confirmed and comes from futabausa.com.
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Futaba micro servo self-tapping screw 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 | 4 mm | 0.4 mm | not stated | not stated | Self-tapping mounting screw for micro-size servosself-tapping / thread-forming | Confirmed |
Fitment records and sources
Self-tapping mounting screw for micro-size servos
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
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 record states 4 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 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
- 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.
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.
-
M2 x 4mm Phillips Wafer Head Machine Screws Black 50-Pack Laptop SSD Repair
$4.49 each · min. 2
-
M2 x 4mm Screws for Dell Latitude 5530 SSD Type-C Bracket 10-Pack Black
$4.99
-
Dell Latitude 5530 Replacement Screws Sold Individually – M2 x 3mm, M2 x 4mm, M2.5 x 5mm Phillips Wafer Head, Black
$0.10Choose size -
HP EliteBook 840 G8 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 4mm, M2.5 x 4mm Phillips Wafer Head, Black
$0.10Choose size
More in Drones, RC & Gimbals
1/10 scale RC cars1/8 scale RC car chassis hardware3D-printed FPV stack mounts and spacers5-inch brushless motor to armAirsoft V2 / EHPA gearbox shellsALware Quad Flyer Spider 500 quadcopter kitAntique wall clock pendulum bracketsArcade marquee retainersARRMA Senton (and similar 1/10 vehicles)ARRMA Senton/kingpin-equipped vehiclesAxial Racing crawler/buggy kitsAxial SCX10 III RC crawler chassis
Browse all 144 in Drones, RC & Gimbals →The same screw also fits
Devices whose records share a thread with Futaba micro servo self-tapping screw, closest length match first.
- Mechanical clock movement plates also M2 × 4 mm
- Scaleauto SC-1652 (1/32 slot car) also M2 × 4 mm
- Micro/whoop FPV drone motors also M2 × 4 mm
- FPV brushless motors (NewBeeDrone etc.) also M2 × 4 mm
- NSR PK guide (1/32 slot car) also M2 × 4 mm
- Vintage radio chassis and dial screws also M2 × 4 mm
- FPV freestyle frames (Djinn F25 SP) also M2 × 4 mm
- HP 635 also M2 × 4 mm
Questions about Futaba micro servo self-tapping screw screws
- What size screw does Futaba micro servo self-tapping screw use?
- M2 × 4 mm for self-tapping mounting screw for micro-size servos.
- How long are the screws in Futaba micro servo self-tapping screw?
- The record gives 4 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 Futaba micro servo self-tapping screw?
- 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 Futaba micro servo self-tapping screw?
- TechSpareWarehouse (our own store) lists M2 x 4mm, which matches the length in the records above.