Dell Inspiron 16 5640 screw size
M1.6 / M2 / M2.5 · 1.8 to 5.5 mm long
Our records put Dell Inspiron 16 5640 on M1.6, M2 and M2.5 screws in lengths from 1.8 to 5.5 mm.
There are 14 separate fitment records for it, including SSD (qty 1) (M1.6), system board (qty 1) (M1.6) and power button (qty 1) (M2), plus 11 more in the table below.
14 of the 14 records are marked confirmed, drawn from 1 source (dell.com).
For reference, M1.6 is 1.6 mm across the threads at 0.35 mm pitch. The imperial size people confuse it with: #1-72 UNF (1.85 mm) is larger; there is no true imperial equivalent.
Dell Inspiron 16 5640 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 | 1.8 mm | 0.35 mm | not stated | not stated | SSD (qty 1) | Confirmed |
| M1.6 | 1.8 mm | 0.35 mm | not stated | not stated | System board (qty 1) | Confirmed |
| M2 | 2.3 mm | 0.4 mm | not stated | not stated | Power button (qty 1) | Confirmed |
| M2 | 2.3 mm | 0.4 mm | not stated | not stated | Touchpad (qty 7) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | I/O board (qty 3) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Battery (qty 5) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Heat sink (qty 3) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | SSD (qty 3) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | System board (qty 4) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | USB-C board (qty 1) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2 | 5.5 mm | 0.4 mm | not stated | not stated | Base cover (qty 6) | Confirmed |
| M2 | 5.5 mm | 0.4 mm | not stated | not stated | Fan (qty 2) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Hinge (qty 5) | Confirmed |
Fitment records and sources
SSD (qty 1)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
System board (qty 1)
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
Touchpad (qty 7)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O board (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 5)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Heat sink (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
USB-C board (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
Base cover (qty 6)
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
Hinge (qty 5)
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 1.8–5.5 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard 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 / M2.5
- Headphone hinge screw sizes are usually quoted from screwdriver bit size, not an actual thread spec - measure before buying.
- 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.
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 16 5640, closest length match first.
- Lenovo LOQ 15ARP10E also M2 × 3.5 mm
- Dell Inspiron 15 7573 2-in-1 also M2.5 × 5 mm
- Lenovo ThinkPad T61 also M2 × 3.5 mm
- Lenovo YOGA 920-13IKB also M2 × 3.5 mm
- Lenovo Z410 also M2.5 × 5 mm
- Acer Aspire 4020 laptop chassis/LCD screws also M2 × 3.5 mm
- Dell Precision 5690 also M1.6 × 1.8 mm
- Dell Inspiron 16 5625 also M2.5 × 5 mm
Questions about Dell Inspiron 16 5640 screws
- What size screw does Dell Inspiron 16 5640 use?
- M1.6 × 1.8 mm for SSD (qty 1); M1.6 × 1.8 mm for system board (qty 1); M2 × 2.3 mm for power button (qty 1); M2 × 2.3 mm for touchpad (qty 7); M2 × 3.5 mm for I/O board (qty 3); M2 × 3.5 mm for battery (qty 5); M2 × 3.5 mm for heat sink (qty 3); M2 × 3.5 mm for SSD (qty 3); M2 × 3.5 mm for system board (qty 4); M2 × 3.5 mm for USB-C board (qty 1); M2 × 3.5 mm for wireless card (qty 1); M2 × 5.5 mm for base cover (qty 6); M2 × 5.5 mm for fan (qty 2); M2.5 × 5 mm for hinge (qty 5).
- How long are the screws in Dell Inspiron 16 5640?
- The records range from 1.8 to 5.5 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 16 5640?
- 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 Inspiron 16 5640?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm and M2.5 x 5mm, which match lengths in the records above.