Axial SCX10 III RC crawler, countersunk and cap screws screw size
M2.5 · 3 to 18 mm long
The screws used on Axial SCX10 III RC crawler, countersunk and cap screws are M2.5 in lengths from 3 to 18 mm.
The record covers M2.5x3 / x6 / x8 countersunk and M2.5x10 / x16 / x18 socket cap in the stock kit.
Head and drive, as the source states them: socket cap head and Hex socket (Allen) drive.
This entry is marked confirmed and comes from applianceelectronics.co.uk.
M2.5 means a 2.5 mm nominal diameter with a 0.45 mm thread pitch. 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.
Axial SCX10 III RC crawler, countersunk and cap screws 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 | 3–18 mm | 0.45 mm | Socket cap | Hex socket (Allen) | M2.5x3 / x6 / x8 countersunk and M2.5x10 / x16 / x18 socket cap in the stock kit | Confirmed |
Fitment records and sources
M2.5x3 / x6 / x8 countersunk and M2.5x10 / x16 / x18 socket cap in the stock kit
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
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 M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- 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: for socket cap screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The records span 3–18 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source names a Hex socket (Allen) drive. For comparison, standard M2.5 heads take PH1 (Phillips) or T8 (Torx), or a 2 mm hex key.
- 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
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
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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Questions about Axial SCX10 III RC crawler, countersunk and cap screws screws
- What size screw does Axial SCX10 III RC crawler, countersunk and cap screws use?
- M2.5 × 3–18 mm for M2.5x3 / x6 / x8 countersunk and M2.5x10 / x16 / x18 socket cap in the stock kit.
- How long are the screws in Axial SCX10 III RC crawler, countersunk and cap screws?
- The records range from 3 to 18 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 Axial SCX10 III RC crawler, countersunk and cap screws?
- The source lists a Hex socket (Allen) drive. Standard M2.5 heads otherwise take PH1 (Phillips) or T8 (Torx), or 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 Axial SCX10 III RC crawler, countersunk and cap screws?
- TechSpareWarehouse (our own store) lists M2.5 x 3mm, M2.5 x 4mm and M2.5 x 5mm, which match lengths in the records above.