Dell Alienware bottom panel screw size
M2.5 · 5 to 6 mm long
The screws used on Dell Alienware bottom panel are M2.5 in lengths from 5 to 6 mm.
Where it is used: heavier Torx screws for the gaming chassis cover.
Head and drive, as the source states them: Torx drive.
This entry is marked reported and comes from dell.com.
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.
Dell Alienware bottom panel 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 | 5–6 mm | 0.45 mm | not stated | Torx | heavier Torx screws for the gaming chassis cover | Reported |
Fitment records and sources
heavier Torx screws for the gaming chassis cover
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Laptop covers and brackets often mix two or three lengths of the same thread, so lay the screws out in the order they came out (a magnetic mat or a sheet of paper with the hole pattern drawn on it works).
- 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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The records span 5–6 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source names a Torx 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
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
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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10x M2.5 x 6mm Phillips Screws for Lenovo ThinkPad X131e Chromebook LCD Hinge
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Dell Inspiron 15 3520 Replacement Screws Sold Individually – M2 x 3mm, M2 x 5mm, M2.5 x 5mm, M3 x 3mm Phillips Wafer Head, Black
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ASUS ROG Strix G15 G513R Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
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ASUS ROG Strix G17 G713 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
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Devices whose records share a thread with Dell Alienware bottom panel, closest length match first.
- HP ProBook 440 G4 also M2.5 × 5 mm
- HP ProBook 4515s also M2.5 × 6 mm
- Lenovo ideapad 330E-15AST U also M2.5 × 5 mm
- Dell Vostro 14 3401 also M2.5 × 5 mm
- HP Fortis 14 G11 also M2.5 × 5 mm
- Lenovo B71-80 also M2.5 × 5 mm
- HP ProBook x360 440 G1 also M2.5 × 5 mm
- HP ProBook 440 G3 also M2.5 × 5 mm
Questions about Dell Alienware bottom panel screws
- What size screw does Dell Alienware bottom panel use?
- M2.5 × 5–6 mm for heavier Torx screws for the gaming chassis cover.
- How long are the screws in Dell Alienware bottom panel?
- The records range from 5 to 6 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 Dell Alienware bottom panel?
- The source lists a Torx 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 Dell Alienware bottom panel?
- TechSpareWarehouse (our own store) lists M2.5 x 5mm and M2.5 x 6mm, which match lengths in the records above.