Dell Alienware area51m R2 screw size
M1.2 / M2 / M2.5 / M3 · 2.5 to 12 mm long
Dell Alienware area51m R2 takes M1.2, M2, M2.5 and M3 metric screws in lengths from 2.5 to 12 mm.
There are 20 separate fitment records for it, including keyboard (qty 57) (M1.2), DC-in (qty 1) (M2) and display (qty 1) (M2), plus 17 more in the table below.
20 of the 20 records are marked confirmed, drawn from 1 source (dl.dell.com).
An M1.2 screw is 1.2 mm in diameter with a 0.25 mm pitch, tapped with a 0.95 mm drill; imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute.
Dell Alienware area51m R2 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 |
|---|---|---|---|---|---|---|
| M1.2 | 2.5 mm | 0.25 mm | not stated | not stated | Keyboard (qty 57) | 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 | Hard drive (qty 4) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Memory (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | SSD (qty 4) | 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 | 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 | Heat sink (qty 2) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | System board (qty 4) | 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
Keyboard (qty 57)
pitch 0.25 mm · tap 0.95 mm · clearance 1.4 mm · PH000 / JIS 00 / Torx T1–T2
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
Hard drive (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Memory (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 4)
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
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
Heat sink (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 4)
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 M1.2 screw measures about 1.2 mm with calipers (usually a hair under). This device also uses M2 / M2.5 / M3, so measure each screw rather than assuming they match.
- Pitch: 0.25 mm from one thread crest to the next (40 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 M1.2 heads take PH000 / JIS 00 for Phillips and T1–T2 for Torx; 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 M1.2 is about 5-8 N·cm into metal threads and 3-5 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.2 / M2 / M2.5 / M3
- Framework lists both M1.2 x 3.0 silver and M1.6 x 3.0 black expansion-card screws; they look identical in the tray but are not interchangeable.
- 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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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Dell Alienware area51m R2, closest length match first.
- Dell XPS M140 also M2 × 3 mm
- HP Compaq nx7300 also M2 × 3 mm
- Lenovo IdeaPad U510 also M2 × 3 mm
- Lenovo G41-35 also M3 × 3 mm
- Lenovo ThinkPad T40 also M2 × 3 mm
- HP EliteBook 845 14 inch G11 also M2.5 × 5 mm
- Lenovo S14 Gen 3 also M2.5 × 5 mm
- Lenovo ThinkPad Edge E120 also M2 × 3 mm
Questions about Dell Alienware area51m R2 screws
- What size screw does Dell Alienware area51m R2 use?
- M1.2 × 2.5 mm for keyboard (qty 57); M2 × 3 mm for DC-in (qty 1); M2 × 3 mm for display (qty 1); M2 × 3 mm for hard drive (qty 4); M2 × 3 mm for memory (qty 1); M2 × 3 mm for SSD (qty 4); 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 unspecified (qty 4); M2.5 × 5 mm for battery (qty 6); M2.5 × 5 mm for heat sink (qty 2); M2.5 × 5 mm for system board (qty 4); M2.5 × 7 mm for unspecified (qty 2); M2.5 × 8 mm for display (qty 2); M2.5 × 8 mm for unspecified (qty 14); M3 × 3 mm for hard drive (qty 4).
- How long are the screws in Dell Alienware area51m R2?
- 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 M1.2 screw?
- 0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.
- What screwdriver do I need for Dell Alienware area51m R2?
- The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.
- Can I use an imperial screw instead of M1.2?
- No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Dell Alienware area51m R2?
- TechSpareWarehouse (our own store) lists M2 x 3mm, M2.5 x 12mm and M2.5 x 5mm, which match lengths in the records above.