Dell Latitude 5420 screw size
M2 / M2.5 · 2 to 5 mm long
Our records put Dell Latitude 5420 on M2 and M2.5 screws in lengths from 2 to 5 mm.
There are 19 separate fitment records for it, including M.2 2280 SSD thermal plate to system board (M2), M.2 2230 SSD thermal plate/holder (M2) and WLAN card bracket to WLAN card (M2), plus 16 more in the table below.
19 of the 19 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 Latitude 5420 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 | 3 mm | 0.4 mm | not stated | not stated | M.2 2280 SSD thermal plate to system board | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | M.2 2230 SSD thermal plate/holder | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | WLAN card bracket to WLAN card | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | WWAN card bracket to WWAN card | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | 3-cell battery to palm-rest/keyboard assembly | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Assembly inner frame to system board and palm-rest | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Assembly inner frame, secondary set | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | System fan to system board | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | eDP/display cable bracket to system board | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | USB Type-C support bracket to system board | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | System board to palm-rest/keyboard assembly | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | Power-button board to palm-rest | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | Smart card reader to palm-rest | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Battery LED board to palm-rest | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Keyboard assembly to palm-rest | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Keyboard bracket to palm-rest | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Display hinge to palm-rest assembly | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | not stated | Display hinge to display back cover | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | not stated | Display panel to display back cover | Confirmed |
Fitment records and sources
M.2 2280 SSD thermal plate to system board
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
M.2 2230 SSD thermal plate/holder
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
WLAN card bracket to WLAN card
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
WWAN card bracket to WWAN card
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
3-cell battery to palm-rest/keyboard assembly
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Assembly inner frame to system board and palm-rest
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Assembly inner frame, secondary set
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System fan to system board
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
eDP/display cable bracket to system board
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
USB Type-C support bracket to system board
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board to palm-rest/keyboard assembly
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Power-button board to palm-rest
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Smart card reader to palm-rest
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery LED board to palm-rest
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard assembly to palm-rest
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard bracket to palm-rest
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display hinge to palm-rest assembly
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display hinge to display back cover
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display panel to display back cover
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
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, 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 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
- M.2 SSD screw length must match the standoff position (2230/2242/2260/2280/22110) or the drive won't clamp.
- 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.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
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 Latitude 5420, closest length match first.
- Lenovo ThinkPad X230 Tablet also M2 × 3 mm
- HP EliteBook x360 1040 G8 also M2 × 3 mm
- Lenovo Legion bottom cover and fans also M2.5 × 5 mm
- HP Spectre 13-v0xx also M2 × 3 mm
- MSI gaming laptop bottom case and heatsink also M2.5 × 5 mm
- Lenovo ideapad 330-17AST also M2 × 3 mm
- Dell Latitude 7480 also M2 × 3 mm
- Dell Alienware m15 R5 also M2 × 3 mm
Questions about Dell Latitude 5420 screws
- What size screw does Dell Latitude 5420 use?
- M2 × 3 mm for M.2 2280 SSD thermal plate to system board; M2 × 3 mm for M.2 2230 SSD thermal plate/holder; M2 × 2.5 mm for WLAN card bracket to WLAN card; M2 × 2.5 mm for WWAN card bracket to WWAN card; M2 × 5 mm for 3-cell battery to palm-rest/keyboard assembly; M2 × 3 mm for assembly inner frame to system board and palm-rest; M2 × 5 mm for assembly inner frame, secondary set; M2 × 5 mm for system fan to system board; M2 × 3 mm for eDP/display cable bracket to system board; M2 × 5 mm for USB Type-C support bracket to system board; M2 × 3 mm for system board to palm-rest/keyboard assembly; M2 × 2.5 mm for power-button board to palm-rest; M2 × 2.5 mm for smart card reader to palm-rest; M2 × 3.
- How long are the screws in Dell Latitude 5420?
- The records range from 2 to 5 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 Latitude 5420?
- 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 Latitude 5420?
- TechSpareWarehouse (our own store) lists M2 x 3mm, M2 x 2.5mm and M2 x 5mm, which match lengths in the records above.