Dell Alienware 17 area51m screw size
M2 / M2.5 / M3 · 2.5 to 12 mm long
Our records put Dell Alienware 17 area51m on M2, M2.5 and M3 screws in lengths from 2.5 to 12 mm.
There are 22 separate fitment records for it, including touchpad (qty 5) (M2), DC-in (qty 1) (M2) and display (qty 1) (M2), plus 19 more in the table below.
22 of the 22 records are marked confirmed, drawn from 1 source (dl.dell.com).
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Dell Alienware 17 area51m 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 | 2.5 mm | 0.4 mm | not stated | not stated | Touchpad (qty 5) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | DC-in (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Display (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Keyboard (qty 15) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | SSD (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Touchpad (qty 5) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified (qty 3) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2.5 | 12 mm | 0.45 mm | not stated | not stated | Unspecified (qty 1) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Display (qty 4) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Hinge (qty 4) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Keyboard (qty 3) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Unspecified (qty 4) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Battery (qty 6) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Hard drive (qty 4) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Heat sink (qty 2, captive)captive | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2.5 | 7 mm | 0.45 mm | not stated | not stated | Unspecified (qty 2) | Confirmed |
| M2.5 | 8 mm | 0.45 mm | not stated | not stated | Display (qty 2) | Confirmed |
| M2.5 | 8 mm | 0.45 mm | not stated | not stated | Unspecified (qty 14) | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | not stated | Hard drive (qty 4) | Confirmed |
Fitment records and sources
Touchpad (qty 5)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
DC-in (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard (qty 15)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Touchpad (qty 5)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Keyboard (qty 3)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Battery (qty 6)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Heat sink (qty 2, captive)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 14)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive (qty 4)
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 2.5–12 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
- M.2 SSD mounting screws (M2 x 3mm) are frequently mislabeled generically as 'M.2 screws' which can be confused with the M2 metric thread designation — they do coincide numerically here but are conceptually distinct (M.2 = card format, M2 = thread size).
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
- 3.5in desktop and enterprise hard drives are 6-32 UNC imperial, not M3 - only the 2.5in form factor is metric.
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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M2.5 x 12mm Phillips Wafer Head Screw for Laptop Bottom Cover Replacement - Single Replacement 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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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Dell Alienware 17 area51m, closest length match first.
- Dell Inspiron 14 5401 also M2 × 2.5 mm
- HP ENVY 17-r1xx also M2 × 2.5 mm
- Dell Inspiron 14 5415 also M2 × 3 mm
- HP G7000 also M2 × 3 mm
- HP ENVY x360 Convertible also M2 × 3 mm
- Dell Vostro 15 5502 also M2 × 3 mm
- Toshiba Satellite 1700 also M2.5 × 12 mm
- HP Pavilion 5500 also M2 × 3 mm
Questions about Dell Alienware 17 area51m screws
- What size screw does Dell Alienware 17 area51m use?
- M2 × 2.5 mm for touchpad (qty 5); M2 × 3 mm for DC-in (qty 1); M2 × 3 mm for display (qty 1); M2 × 3 mm for keyboard (qty 15); M2 × 3 mm for SSD (qty 2); M2 × 3 mm for system board (qty 2); M2 × 3 mm for touchpad (qty 5); M2 × 3 mm for unspecified (qty 3); M2 × 3 mm for wireless card (qty 1); M2.5 × 12 mm for unspecified (qty 1); M2.5 × 2.5 mm for display (qty 4); M2.5 × 2.5 mm for hinge (qty 4); M2.5 × 2.5 mm for keyboard (qty 3); M2.5 × 2.5 mm for unspecified (qty 4); M2.5 × 5 mm for battery (qty 6); M2.5 × 5 mm for hard drive (qty 4); M2.5 × 5 mm for heat sink (qty 2, captive); M2.5 × 5 mm for system board (qty 2); M2.5 × 7 mm for unspecified (qty 2); M2.5 × 8 mm for display (qty 2); M2.5.
- How long are the screws in Dell Alienware 17 area51m?
- The records range from 2.5 to 12 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 Dell Alienware 17 area51m?
- 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 Dell Alienware 17 area51m?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm, M2 x 3mm and M2.5 x 12mm, which match lengths in the records above.




