Dell Precision 7520 screw size
M2 / M2.5 / M3 · 2.5 to 8 mm long
The screws used on Dell Precision 7520 are M2, M2.5 and M3 in lengths from 2.5 to 8 mm.
There are 23 separate fitment records for it, including keyboard (M2), bracket (qty 1) (M2) and display (M2), plus 20 more in the table below.
23 of the 23 records are marked confirmed, drawn from 1 source (dl.dell.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.
Dell Precision 7520 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 | Keyboard | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Bracket (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Display | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Hinge | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Palm rest (qty 15) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Power button | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | SSD (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Touchpad | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2 | 8 mm | 0.4 mm | not stated | not stated | Palm rest (qty 15) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Display | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Hinge | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | I/O board | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Base cover | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Bracket | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Card reader | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Hard drive | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Heat sink (captive)captive | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Palm rest (qty 15) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | System board (qty 1) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Unspecified (qty 1) | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | not stated | Hard drive | Confirmed |
Fitment records and sources
Keyboard
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Bracket (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hinge
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Palm rest (qty 15)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Power button
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
Touchpad
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified
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
Palm rest (qty 15)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
I/O board
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Base cover
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Bracket
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Card reader
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Heat sink (captive)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 15)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 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 2.5–8 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.
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
- Server drive caddy screws (Dell, HP) are usually M3 in very short lengths (3-4mm) because they bite into thin sheet metal — they are NOT the 6-32 UNC screws that go into the drive's own side holes.
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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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 Precision 7520, closest length match first.
- HP OmniBook 16-ba1xxx also M2 × 2.5 mm
- HP EliteBook 8440p also M2 × 3 mm
- HP Evo N610c also M2.5 × 4 mm
- Dell Inspiron 11 3162 also M2 × 3 mm
- Dell Inspiron 15 5502 also M2 × 3 mm
- Lenovo Y50-70 also M2 × 3 mm
- HP Compaq Presario CQ50 also M2 × 3 mm
- Dell Vostro 1310 also M2 × 3 mm
Questions about Dell Precision 7520 screws
- What size screw does Dell Precision 7520 use?
- M2 × 2.5 mm for keyboard; M2 × 3 mm for bracket (qty 1); M2 × 3 mm for display; M2 × 3 mm for hinge; M2 × 3 mm for palm rest (qty 15); M2 × 3 mm for power button; M2 × 3 mm for SSD (qty 1); M2 × 3 mm for touchpad; M2 × 3 mm for unspecified; M2 × 3 mm for wireless card (qty 1); M2 × 8 mm for palm rest (qty 15); M2.5 × 4 mm for display; M2.5 × 4 mm for hinge; M2.5 × 5 mm for I/O board; M2.5 × 5 mm for base cover; M2.5 × 5 mm for bracket; M2.5 × 5 mm for card reader; M2.5 × 5 mm for hard drive; M2.5 × 5 mm for heat sink (captive); M2.5 × 5 mm for palm rest (qty 15); M2.5 × 5 mm for system board (qty 1); M2.5 × 5 mm for unspecified (qty 1); M3 × 3 mm for hard drive.
- How long are the screws in Dell Precision 7520?
- The records range from 2.5 to 8 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 Precision 7520?
- 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 Precision 7520?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm, M2 x 3mm and M2 x 8mm, which match lengths in the records above.