What size screw does ALware Quad Flyer Spider 500 quadcopter kit use?

M2 × 6–8 mm for M2 x 6mm and M2 x 8mm hex cap screws for frame and arm assembly; M3 × 4–8 mm for M3 x 4mm and M3 x 8mm hex cap screws in the frame hardware bag.

How long are the screws in ALware Quad Flyer Spider 500 quadcopter kit?

The records range from 4 to 8 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 ALware Quad Flyer Spider 500 quadcopter kit?

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 ALware Quad Flyer Spider 500 quadcopter kit?

TechSpareWarehouse (our own store) lists M2 x 6mm, M2 x 8mm and M3 x 4mm, which match lengths in the records above.

ALware Quad Flyer Spider 500 quadcopter kit screw size

M2 / M3 · 4 to 8 mm long

The screws used on ALware Quad Flyer Spider 500 quadcopter kit are M2 and M3 in lengths from 4 to 8 mm.

There are 2 separate fitment records for it, including M2 x 6mm and M2 x 8mm hex cap screws for frame and arm assembly (M2) and M3 x 4mm and M3 x 8mm hex cap screws in the frame hardware bag (M3).

Head and drive, as the sources state them: socket cap head.

2 of the 2 records are marked confirmed, drawn from 1 source (alwarerc.manymanuals.com).

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.

ALware Quad Flyer Spider 500 quadcopter kit 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	6–8 mm	0.4 mm	Socket cap	not stated	M2 x 6mm and M2 x 8mm hex cap screws for frame and arm assembly	Confirmed
M3	4–8 mm	0.5 mm	Socket cap	not stated	M3 x 4mm and M3 x 8mm hex cap screws in the frame hardware bag	Confirmed

Fitment records and sources

M26-8mmconfirmed

M2 x 6mm and M2 x 8mm hex cap screws for frame and arm assembly

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

Source

M34-8mmconfirmed

M3 x 4mm and M3 x 8mm hex cap screws in the frame hardware bag

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

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 M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M3, so measure each screw rather than assuming they match.
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: for socket cap screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
The records span 4–8 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard 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 / M3

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.
Cleanroom/vacuum-rated M3 screws (titanium, vented, low-outgas) from NBK are a distinct specialty class, priced and sourced very differently from commodity M3 hardware — do not substitute one for the other in semiconductor fixtures.
Camera and tripod mounting threads themselves are imperial 1/4in-20 or 3/8in-16 — the metric M2-M4 screws in rig kits are only for the accessory hardware, not the tripod mount.

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 ALware Quad Flyer Spider 500 quadcopter kit, closest length match first.

PyroDrone anti-vibration FC standoffs also M3 × 7 mm
Mechanical clock movement plates also M2 × 6 mm
E-flite Gee Bee R-2 wing connector also M2 × 8 mm
TBS Source One V3 / HD FPV frame also M3 × 6–8 mm
FPV drone motors (5-inch class) also M3 × 6–8 mm
Tamiya 3-piece front wheels also M2 × 8 mm
RC brushless motor mounts also M3 × 8 mm
DJI Avata propellers also M2 × 7 mm

Questions about ALware Quad Flyer Spider 500 quadcopter kit screws

What size screw does ALware Quad Flyer Spider 500 quadcopter kit use?: M2 × 6–8 mm for M2 x 6mm and M2 x 8mm hex cap screws for frame and arm assembly; M3 × 4–8 mm for M3 x 4mm and M3 x 8mm hex cap screws in the frame hardware bag.
How long are the screws in ALware Quad Flyer Spider 500 quadcopter kit?: The records range from 4 to 8 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 ALware Quad Flyer Spider 500 quadcopter kit?: 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 ALware Quad Flyer Spider 500 quadcopter kit?: TechSpareWarehouse (our own store) lists M2 x 6mm, M2 x 8mm and M3 x 4mm, which match lengths in the records above.

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