Dell Vostro 14 3401 screw size
M2 / M2.5 / M3 · 2 to 5 mm long
Our records put Dell Vostro 14 3401 on M2, M2.5 and M3 screws in lengths from 2 to 5 mm.
There are 17 separate fitment records for it, including palm rest (qty 2) (M2), power button (qty 2) (M2) and SSD (qty 1) (M2), plus 14 more in the table below.
17 of the 17 records are marked confirmed, drawn from 1 source (dl.dell.com).
An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
Dell Vostro 14 3401 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 | Palm rest (qty 2) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Power button (qty 2) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | SSD (qty 1) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Touchpad (qty 3) | Confirmed |
| M2 | 2.2 mm | 0.4 mm | not stated | not stated | SSD (qty 2, captive)captive | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Battery (qty 3) | 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 | Wireless card (qty 1) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | I/O board (qty 4) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Display (qty 6) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Base cover (qty 7, captive)captive | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Display (qty 4) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Fan (qty 2) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Hinge (qty 2) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | not stated | Hard drive (qty 4) | Confirmed |
Fitment records and sources
Palm rest (qty 2)
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
Touchpad (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 2, captive)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 3)
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
Wireless card (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O board (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 2)
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
Base cover (qty 7, captive)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Fan (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 2)
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 2–5 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 / 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.
- Thorlabs' 16mm cage system standard plates use dual 4-40 (UNC) and M3 taps on the same plate (e.g., SP01), so metric and imperial fasteners are both valid depending on the region/kit purchased.
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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The same screw also fits
Devices whose records share a thread with Dell Vostro 14 3401, closest length match first.
- Dell Alienware m16 R2 also M2 × 3 mm
- Lenovo ThinkPad X1 Carbon 1st Gen also M2 × 3 mm
- Dell Latitude 3330 also M2 × 2 mm
- Lenovo ThinkPad T490 also M2 × 2 mm
- Lenovo ideapad 330E-15AST U also M2 × 3 mm
- HP ProBook 4515s also M2 × 2 mm
- HP ProBook 440 G4 also M2 × 2 mm
- Dell Alienware bottom panel also M2.5 × 5 mm
Questions about Dell Vostro 14 3401 screws
- What size screw does Dell Vostro 14 3401 use?
- M2 × 2 mm for palm rest (qty 2); M2 × 2 mm for power button (qty 2); M2 × 2 mm for SSD (qty 1); M2 × 2 mm for touchpad (qty 3); M2 × 2.2 mm for SSD (qty 2, captive); M2 × 3 mm for battery (qty 3); M2 × 3 mm for hard drive (qty 4); M2 × 3 mm for wireless card (qty 1); M2 × 4 mm for I/O board (qty 4); M2 × 4 mm for system board (qty 2); M2.5 × 2.5 mm for display (qty 6); M2.5 × 5 mm for base cover (qty 7, captive); M2.5 × 5 mm for display (qty 4); M2.5 × 5 mm for fan (qty 2); M2.5 × 5 mm for hinge (qty 2); M2.5 × 5 mm for system board (qty 2); M3 × 3 mm for hard drive (qty 4).
- How long are the screws in Dell Vostro 14 3401?
- 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 Vostro 14 3401?
- 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 Vostro 14 3401?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 4mm, which match lengths in the records above.