What size screw does Makeblock mBot Neo/mBot2 assembly kit use?

M2.5 × 12 mm for official parts list for building the robot explicitly includes 'Screw M2.5*12mm'; M4 × 8–25 mm for official parts list explicitly specifies 'Screw M4*25mm', 'Screw M4*14mm', and 'Screw M4*8mm' for chassis/wheel/motor assembly.

How long are the screws in Makeblock mBot Neo/mBot2 assembly kit?

The records range from 8 to 25 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M2.5 screw?

0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.

What screwdriver do I need for Makeblock mBot Neo/mBot2 assembly kit?

The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.

Can I use an imperial screw instead of M2.5?

No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Makeblock mBot Neo/mBot2 assembly kit?

TechSpareWarehouse (our own store) lists M2.5 x 12mm, which matches the length in the records above.

Makeblock mBot Neo/mBot2 assembly kit screw size

M2.5 / M4 · 8 to 25 mm long

Our records put Makeblock mBot Neo/mBot2 assembly kit on M2.5 and M4 screws in lengths from 8 to 25 mm.

There are 2 separate fitment records for it, including official parts list for building the robot explicitly includes 'Screw M2.5*12mm' (M2.5) and official parts list explicitly specifies 'Screw M4*25mm', 'Screw M4*14mm', and 'Screw M4*8 (M4).

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

An M2.5 screw is 2.5 mm in diameter with a 0.45 mm pitch, tapped with a 2.05 mm drill; imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.

Makeblock mBot Neo/mBot2 assembly 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
M2.5	12 mm	0.45 mm	not stated	not stated	Official parts list for building the robot explicitly includes 'Screw M2.5*12mm'	Confirmed
M4	8–25 mm	0.7 mm	not stated	not stated	Official parts list explicitly specifies 'Screw M425mm', 'Screw M414mm', and 'Screw M4*8mm' for chassis/wheel/motor assembly	Confirmed

Fitment records and sources

M2.512mmconfirmed

Official parts list for building the robot explicitly includes 'Screw M2.5*12mm'

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

Source

M48-25mmconfirmed

Official parts list explicitly specifies 'Screw M4*25mm', 'Screw M4*14mm', and 'Screw M4*8mm' for chassis/wheel/motor assembly

pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20

Source

How to check the screw before you buy

Into printed plastic, the screw either self-taps or needs a heat-set insert; machine screws straight into plastic strip easily.
Diameter: across the threads an M2.5 screw measures about 2.5 mm with calipers (usually a hair under). This device also uses M4, so measure each screw rather than assuming they match.
Pitch: 0.45 mm from one thread crest to the next (22.22 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 8–25 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 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 M2.5 is about 45-70 N·cm into metal threads and 20-35 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M2.5 / M4

Commonly confused with imperial 4-40 screws in older medical equipment, but modern GE/Mindray devices explicitly list M2.5 metric threads.
Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
Robot vacuum, air purifier and baby monitor teardowns list screws by driver and length only — length is not a thread size.
Most HVAC chassis hardware in US-market units is imperial; metric shows up mainly on European-made components.

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 Makeblock mBot Neo/mBot2 assembly kit, closest length match first.

Inventables X-Carve 300W 24VDC spindle kit also M4 × 10 mm
Ultimaker Original heated bed / Z-stage upgrade kit also M4 × 10 mm
InMoov open-source robot also M4 × 20 mm
Zodiac Vortex 3 Saphir robotic pool cleaner also M4 × 25 mm
Carbide3D Shapeoko 5 Pro CNC router also M4 × 8–25 mm
Makeblock cap screw round head hex M4 (catalog part) also M4 × 22–25 mm
PCB standoffs for compact electronics also M2.5 × 12 mm
Creality K1/Ender extrusion corner brackets also M4 × 8–16 mm

Questions about Makeblock mBot Neo/mBot2 assembly kit screws

What size screw does Makeblock mBot Neo/mBot2 assembly kit use?: M2.5 × 12 mm for official parts list for building the robot explicitly includes 'Screw M2.5*12mm'; M4 × 8–25 mm for official parts list explicitly specifies 'Screw M4*25mm', 'Screw M4*14mm', and 'Screw M4*8mm' for chassis/wheel/motor assembly.
How long are the screws in Makeblock mBot Neo/mBot2 assembly kit?: The records range from 8 to 25 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M2.5 screw?: 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
What screwdriver do I need for Makeblock mBot Neo/mBot2 assembly kit?: The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.
Can I use an imperial screw instead of M2.5?: No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Makeblock mBot Neo/mBot2 assembly kit?: TechSpareWarehouse (our own store) lists M2.5 x 12mm, which matches the length in the records above.

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