Acer Aspire 4250 screw size
M2 / M2.5 / M3 · 2 to 5 mm long
Acer Aspire 4250 takes M2, M2.5 and M3 metric screws in lengths from 2 to 5 mm.
There are 5 separate fitment records for it, including screw List Table 6-4: SCREW M2-0.4*2-I(BNI)(NYLOK)IRON (M2), screw List Table 6-4: SCREW M2.0*3.0-I(BKAG)(NYLOK IRON) (M2) and screw List Table 6-4: SCREW M2.0*5-I(NI...) (M2), plus 2 more in the table below.
5 of the 5 records are marked confirmed, drawn from 1 source (manualowl.com).
M2 means a 2 mm nominal diameter with a 0.4 mm thread pitch. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
Acer Aspire 4250 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 | 2 mm | 0.4 mm | not stated | not stated | Screw List Table 6-4: SCREW M2-0.4*2-I(BNI)(NYLOK)IRON | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Screw List Table 6-4: SCREW M2.0*3.0-I(BKAG)(NYLOK IRON) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Screw List Table 6-4: SCREW M2.0*5-I(NI...) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Screw List Table 6-4: SCREW M2.5*4.0-I(NI)(NYLOK) | Confirmed |
| M3 | 3.5 mm | 0.5 mm | not stated | not stated | Screw List Table 6-4: SCREW M3*0.5+3.5I | Confirmed |
Fitment records and sources
Screw List Table 6-4: SCREW M2-0.4*2-I(BNI)(NYLOK)IRON
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Screw List Table 6-4: SCREW M2.0*3.0-I(BKAG)(NYLOK IRON)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Screw List Table 6-4: SCREW M2.0*5-I(NI...)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Screw List Table 6-4: SCREW M2.5*4.0-I(NI)(NYLOK)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Screw List Table 6-4: SCREW M3*0.5+3.5I
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
How to check the screw before you buy
- A screw that is even 1 mm too long in a laptop base can push into the keyboard, battery or a board trace, so match the length position by position.
- Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M2.5 / 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: 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 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 / M2.5 / M3
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- Commonly confused with imperial 4-40 screws in older medical equipment, but modern GE/Mindray devices explicitly list M2.5 metric threads.
- Blender, toothbrush and shaver teardowns list Torx/Phillips bit sizes only; a T8 bit tells you nothing about the thread.
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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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Acer Aspire 4250, closest length match first.
- HP 6710b also M2 × 3 mm
- Lenovo Slim 7 14ILL10 also M2 × 2 mm
- Lenovo 100e Chromebook also M2 × 3 mm
- Acer Aspire 4530 also M2 × 3 mm
- HP EliteBook 845 G8 also M2 × 2 mm
- Laptop 2.5in drive caddy also M2 × 3 mm
- Lenovo Ideapad 100-15IBY also M2 × 2 mm
- Acer TravelMate 5220G also M2 × 3 mm
Questions about Acer Aspire 4250 screws
- What size screw does Acer Aspire 4250 use?
- M2 × 2 mm for screw List Table 6-4: SCREW M2-0.4*2-I(BNI)(NYLOK)IRON; M2 × 3 mm for screw List Table 6-4: SCREW M2.0*3.0-I(BKAG)(NYLOK IRON); M2 × 5 mm for screw List Table 6-4: SCREW M2.0*5-I(NI...); M2.5 × 4 mm for screw List Table 6-4: SCREW M2.5*4.0-I(NI)(NYLOK); M3 × 3.5 mm for screw List Table 6-4: SCREW M3*0.5+3.5I.
- How long are the screws in Acer Aspire 4250?
- 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 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 Acer Aspire 4250?
- 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 Acer Aspire 4250?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 5mm, which match lengths in the records above.