Dell Precision 5520 screw size
M1.6 / M2 / M2.5 · 1.5 to 8 mm long
If you are replacing a screw on Dell Precision 5520, the thread is M1.6, M2 and M2.5 in lengths from 1.5 to 8 mm.
There are 14 separate fitment records for it, including keyboard (qty 31) (M1.6), speaker (qty 4) (M2) and system board (qty 1) (M2), plus 11 more in the table below.
Head and drive, as the sources state them: Torx drive.
14 of the 14 records are marked confirmed, drawn from 1 source (dl.dell.com).
An M1.6 screw is 1.6 mm in diameter with a 0.35 mm pitch, tapped with a 1.25 mm drill; imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.
Dell Precision 5520 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 |
|---|---|---|---|---|---|---|
| M1.6 | 1.5 mm | 0.35 mm | not stated | not stated | Keyboard (qty 31) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Speaker (qty 4) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | System board (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Base cover (qty 10) | 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 | Heat sink (qty 4) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | SSD (qty 1) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Battery (qty 7) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Fan (qty 4) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Hard drive (qty 4) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | System board (qty 5) | Confirmed |
| M2 | 8 mm | 0.4 mm | not stated | Torx | Base cover (qty 2, Torx) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Display (qty 6) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Hinge (qty 6) | Confirmed |
Fitment records and sources
Keyboard (qty 31)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Speaker (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 10)
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
Heat sink (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 7)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (qty 4)
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
System board (qty 5)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 2, Torx)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 6)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 6)
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 M1.6 screw measures about 1.6 mm with calipers (usually a hair under). This device also uses M2 / M2.5, so measure each screw rather than assuming they match.
- Pitch: 0.35 mm from one thread crest to the next (28.57 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 1.5–8 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 M1.6 heads take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
- Tightening: no device-specific torque is published in these records. The site's general figure for M1.6 is about 12-20 N·cm into metal threads and 6-10 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.6 / M2 / M2.5
- M1.6 is the most common laptop-internal micro screw after M2 — Dell XPS keyboards specifically call out M1.6 x 1.5mm, and generic M2 substitutes strip the bracket.
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
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 Precision 5520, closest length match first.
- HP ProBook 455 G2 also M2 × 3 mm
- Lenovo ThinkPad Edge E440 also M2 × 3 mm
- Lenovo ideapad 700-15ISK also M2 × 3 mm
- Lenovo ThinkPad P73 also M2 × 3 mm
- Dell Latitude C840 also M2 × 3 mm
- Dell Inspiron 8500 also M2 × 3 mm
- HP ProBook 470 G0 also M2 × 2 mm
- Dell Precision 7780 also M2 × 2 mm
Questions about Dell Precision 5520 screws
- What size screw does Dell Precision 5520 use?
- M1.6 × 1.5 mm for keyboard (qty 31); M2 × 2 mm for speaker (qty 4); M2 × 2 mm for system board (qty 1); M2 × 3 mm for base cover (qty 10); M2 × 3 mm for DC-in (qty 1); M2 × 3 mm for heat sink (qty 4); M2 × 3 mm for SSD (qty 1); M2 × 4 mm for battery (qty 7); M2 × 4 mm for fan (qty 4); M2 × 4 mm for hard drive (qty 4); M2 × 4 mm for system board (qty 5); M2 × 8 mm for base cover (qty 2, Torx); M2.5 × 5 mm for display (qty 6); M2.5 × 5 mm for hinge (qty 6).
- How long are the screws in Dell Precision 5520?
- The records range from 1.5 to 8 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M1.6 screw?
- 0.35 mm (coarse), which is the standard pitch for M1.6 machine screws; a 0.2 mm fine pitch exists but is uncommon. The tap drill is 1.25 mm and the normal clearance hole is 1.8 mm.
- What screwdriver do I need for Dell Precision 5520?
- The source lists a Torx drive. Standard M1.6 heads otherwise take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
- Can I use an imperial screw instead of M1.6?
- No. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent. Use a true M1.6 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Dell Precision 5520?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 4mm, which match lengths in the records above.