Dell Inspiron 14 3420 screw size
M1.6 / M2 / M2.5 · 2 to 5 mm long
Our records put Dell Inspiron 14 3420 on M1.6, M2 and M2.5 screws in lengths from 2 to 5 mm.
There are 12 separate fitment records for it, including battery (qty 1, Torx T5) (M1.6), power button (qty 1) (M2) and system board (qty 1) (M2), plus 9 more in the table below.
Head and drive, as the sources state them: Torx T5 drive.
12 of the 12 records are marked confirmed, drawn from 1 source (dell.com).
M1.6 means a 1.6 mm nominal diameter with a 0.35 mm thread pitch. Imperial look-alike: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.
Dell Inspiron 14 3420 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 | 3.4 mm | 0.35 mm | not stated | Torx T5 | Battery (qty 1, Torx T5) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Power button (qty 1) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | System board (qty 1) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Touchpad (qty 6) | 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 6) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Heat sink (qty 9) | 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 | Wireless card (qty 1) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | System board (qty 3) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Base cover (qty 4) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Display (qty 4) | Confirmed |
Fitment records and sources
Battery (qty 1, Torx T5)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Power button (qty 1)
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
Touchpad (qty 6)
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 6)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Heat sink (qty 9)
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
Wireless card (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4)
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 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 2–5 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source names a Torx T5 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 Inspiron 14 3420, closest length match first.
- Acer Aspire 4230 also M2 × 3 mm
- HP Mini 5103 also M2 × 2 mm
- M.2 NVMe SSD to motherboard standoff also M2 × 2 mm
- Acer TravelMate 7230 also M2 × 3 mm
- HP ProBook 450 G1 also M2 × 2 mm
- Dell Latitude / Inspiron battery also M2 × 3 mm
- Lenovo IdeaPad Z400 Touch also M2 × 2 mm
- Lenovo ThinkPad X13 Gen 1 also M2 × 2 mm
Questions about Dell Inspiron 14 3420 screws
- What size screw does Dell Inspiron 14 3420 use?
- M1.6 × 3.4 mm for battery (qty 1, Torx T5); M2 × 2 mm for power button (qty 1); M2 × 2 mm for system board (qty 1); M2 × 2 mm for touchpad (qty 6); M2 × 3 mm for I/O board (qty 2); M2 × 3 mm for battery (qty 6); M2 × 3 mm for heat sink (qty 9); M2 × 3 mm for SSD (qty 1); M2 × 3 mm for wireless card (qty 1); M2 × 4 mm for system board (qty 3); M2 × 5 mm for base cover (qty 4); M2.5 × 5 mm for display (qty 4).
- How long are the screws in Dell Inspiron 14 3420?
- 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 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 Inspiron 14 3420?
- The source lists a Torx T5 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 Inspiron 14 3420?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 4mm, which match lengths in the records above.