Dell Inspiron 14 5491 screw size
M2 / M2.5 / M3 · 2 to 6 mm long
Dell Inspiron 14 5491 takes M2, M2.5 and M3 metric screws in lengths from 2 to 6 mm.
There are 15 separate fitment records for it, including system board (qty 6, broadhead) (M2), touchpad (qty 4, broadhead) (M2) and I/O board (qty 2) (M2), plus 12 more in the table below.
15 of the 15 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 Inspiron 14 5491 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 mm | 0.4 mm | not stated | not stated | System board (qty 6, broadhead) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Touchpad (qty 4, broadhead) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | I/O board (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Battery (qty 4) | 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 | Fan (qty 2) | 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 | Power button (qty 2) | 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 | USB-C board (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2 | 6 mm | 0.4 mm | not stated | not stated | Base cover (qty 6) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Display (qty 6) | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | not stated | Hard drive (qty 4) | Confirmed |
Fitment records and sources
System board (qty 6, broadhead)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Touchpad (qty 4, broadhead)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O board (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 4)
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
Fan (qty 2)
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
Power button (qty 2)
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
USB-C board (qty 2)
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
Base cover (qty 6)
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
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 2–6 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.
- LED strip clips strip easily — M3x12 into thin plastic should be hand-driven, never with a power driver.
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 Inspiron 14 5491, closest length match first.
- Lenovo YOGA 730-13IKB also M2 × 2 mm
- Dell Inspiron 14 5485 also M2 × 2 mm
- HP Pavilion / Omen hinges also M2.5 × 5 mm
- Dell Alienware x15 R2 also M2 × 3 mm
- Dell Vostro 14 5402 also M2 × 2 mm
- ASUS ROG Zephyrus M16 (GU603) also M2 × 2 mm
- Lenovo ThinkPad T14s Gen 2 also M2 × 3 mm
- Dell Inspiron 14 5490 also M2 × 2 mm
Questions about Dell Inspiron 14 5491 screws
- What size screw does Dell Inspiron 14 5491 use?
- M2 × 2 mm for system board (qty 6, broadhead); M2 × 2 mm for touchpad (qty 4, broadhead); M2 × 3 mm for I/O board (qty 2); M2 × 3 mm for battery (qty 4); M2 × 3 mm for DC-in (qty 1); M2 × 3 mm for fan (qty 2); M2 × 3 mm for hard drive (qty 4); M2 × 3 mm for memory (qty 1); M2 × 3 mm for power button (qty 2); M2 × 3 mm for SSD (qty 1); M2 × 3 mm for USB-C board (qty 2); M2 × 3 mm for wireless card (qty 1); M2 × 6 mm for base cover (qty 6); M2.5 × 5 mm for display (qty 6); M3 × 3 mm for hard drive (qty 4).
- How long are the screws in Dell Inspiron 14 5491?
- The records range from 2 to 6 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 Inspiron 14 5491?
- 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 Inspiron 14 5491?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 6mm, which match lengths in the records above.