Dell Latitude 7440 screw size
M1.6 / M2 · 1.4 to 4 mm long
Our records put Dell Latitude 7440 on M1.6 and M2 screws in lengths from 1.4 to 4 mm.
There are 14 separate fitment records for it, including keyboard (qty 6) (M1.6), keyboard (qty 19) (M1.6) and power button (qty 2) (M1.6), plus 11 more in the table below.
14 of the 14 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 Latitude 7440 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 | 1.4 mm | 0.35 mm | not stated | not stated | Keyboard (qty 6) | Confirmed |
| M1.6 | 1.7 mm | 0.35 mm | not stated | not stated | Keyboard (qty 19) | Confirmed |
| M1.6 | 1.7 mm | 0.35 mm | not stated | not stated | Power button (qty 2) | Confirmed |
| M1.6 | 2.5 mm | 0.35 mm | not stated | not stated | Wireless card (qty 4) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Bracket (qty 1) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Camera (qty 2) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Card reader (qty 4) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Unspecified (qty 1) | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | Unspecified (qty 3) | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Heat sink (qty 2, captive)captive | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | SSD (qty 1) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | System board (qty 9) | Confirmed |
Fitment records and sources
Keyboard (qty 6)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Keyboard (qty 19)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Power button (qty 2)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Wireless card (qty 4)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Bracket (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Camera (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Card reader (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
Unspecified (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 3)
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
Heat sink (qty 2, captive)
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
System board (qty 9)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
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, 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 1.4–4 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M1.6 heads take PH00 for Phillips and T4–T5 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 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
- 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.
- 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).
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 7440, closest length match first.
- Dell Inspiron 15 7510 also M2 × 2 mm
- Lenovo S21e also M2 × 2 mm
- Dell Latitude 5520 also M2 × 2 mm
- Dell G15 5510 also M2 × 2 mm
- Lenovo ThinkPad SL500 also M2 × 4 mm
- Toshiba Satellite A105 also M2 × 4 mm
- HP 2101525780; all three pages checked, same PDF) also M2 × 2 mm
- Dell Latitude 7424 also M2 × 2 mm
Questions about Dell Latitude 7440 screws
- What size screw does Dell Latitude 7440 use?
- M1.6 × 1.4 mm for keyboard (qty 6); M1.6 × 1.7 mm for keyboard (qty 19); M1.6 × 1.7 mm for power button (qty 2); M1.6 × 2.5 mm for wireless card (qty 4); M2 × 2 mm for bracket (qty 1); M2 × 2 mm for camera (qty 2); M2 × 2 mm for card reader (qty 4); M2 × 2 mm for system board (qty 2); M2 × 2 mm for unspecified (qty 1); M2 × 2.5 mm for unspecified (qty 3); M2 × 2.5 mm for wireless card (qty 1); M2 × 4 mm for heat sink (qty 2, captive); M2 × 4 mm for SSD (qty 1); M2 × 4 mm for system board (qty 9).
- How long are the screws in Dell Latitude 7440?
- The records range from 1.4 to 4 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 Latitude 7440?
- The sources do not name the drive. For M1.6, Phillips heads normally take PH00 and Torx heads T4–T5; socket heads take 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 Latitude 7440?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 2.5mm and M2 x 4mm, which match lengths in the records above.