Dell Inspiron 17 7786 screw size
M1.2 / M1.4 / M2 / M2.5 / M3 · 1.5 to 5 mm long
Dell Inspiron 17 7786 takes M1.2, M1.4, M2, M2.5 and M3 metric screws in lengths from 1.5 to 5 mm.
There are 16 separate fitment records for it, including keyboard (qty 5) (M1.2), keyboard (qty 32) (M1.4) and system board (qty 1) (M2), plus 13 more in the table below.
16 of the 16 records are marked confirmed, drawn from 1 source (dell.com).
For reference, M1.2 is 1.2 mm across the threads at 0.25 mm pitch. The imperial size people confuse it with: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute.
Dell Inspiron 17 7786 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 |
|---|---|---|---|---|---|---|
| M1.2 | 1.5 mm | 0.25 mm | not stated | not stated | Keyboard (qty 5) | Confirmed |
| M1.4 | 2 mm | 0.3 mm | not stated | not stated | Keyboard (qty 32) | 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 4) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | I/O board (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Battery (qty 5) | 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 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 | Hinge (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 | Wireless card (qty 1) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Base cover (qty 6) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Hinge (qty 6) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Hinge (qty 4) | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | not stated | Power button (qty 1) | Confirmed |
Fitment records and sources
Keyboard (qty 5)
pitch 0.25 mm · tap 0.95 mm · clearance 1.4 mm · PH000 / JIS 00 / Torx T1–T2
Keyboard (qty 32)
pitch 0.3 mm · tap 1.1 mm · clearance 1.6 mm · PH000 / PH00 / Torx T2–T3
System board (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Touchpad (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O board (qty 1)
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
DC-in (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (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
Hinge (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
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
Hinge (qty 6)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Power button (qty 1)
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 M1.2 screw measures about 1.2 mm with calipers (usually a hair under). This device also uses M1.4 / M2 / M2.5 / M3, so measure each screw rather than assuming they match.
- Pitch: 0.25 mm from one thread crest to the next (40 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 1.5–5 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M1.2 heads take PH000 / JIS 00 for Phillips and T1–T2 for Torx; 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 M1.2 is about 5-8 N·cm into metal threads and 3-5 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.2 / M1.4 / M2 / M2.5 / M3
- Framework lists both M1.2 x 3.0 silver and M1.6 x 3.0 black expansion-card screws; they look identical in the tray but are not interchangeable.
- Dental implant screws (M1.4/M1.6) are proprietary per system — Bredent, NeoBiotech, Nobel and Straumann are not interchangeable even at the same nominal size.
- 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 17 7786, closest length match first.
- Lenovo V14 Gen 2 also M2 × 2 mm
- Acer Aspire 4715Z also M2 × 3 mm
- Dell Inspiron 15 3567 also M2 × 2 mm
- HP 425 also M2 × 2 mm
- Dell Latitude 7450 also M2 × 2 mm
- Lenovo ThinkPad SL510 also M2 × 2 mm
- Lenovo ideapad 320H-17ABR also M2 × 3 mm
- Lenovo ThinkPad S531 also M2 × 2 mm
Questions about Dell Inspiron 17 7786 screws
- What size screw does Dell Inspiron 17 7786 use?
- M1.2 × 1.5 mm for keyboard (qty 5); M1.4 × 2 mm for keyboard (qty 32); M2 × 2 mm for system board (qty 1); M2 × 2 mm for touchpad (qty 4); M2 × 3 mm for I/O board (qty 1); M2 × 3 mm for battery (qty 5); M2 × 3 mm for DC-in (qty 1); M2 × 3 mm for fan (qty 3); M2 × 3 mm for hard drive (qty 4); M2 × 3 mm for hinge (qty 2); M2 × 3 mm for SSD (qty 1); M2 × 3 mm for wireless card (qty 1); M2 × 5 mm for base cover (qty 6); M2.5 × 2.5 mm for hinge (qty 6); M2.5 × 5 mm for hinge (qty 4); M3 × 3 mm for power button (qty 1).
- How long are the screws in Dell Inspiron 17 7786?
- The records range from 1.5 to 5 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M1.2 screw?
- 0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.
- What screwdriver do I need for Dell Inspiron 17 7786?
- The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.
- Can I use an imperial screw instead of M1.2?
- No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Dell Inspiron 17 7786?
- TechSpareWarehouse (our own store) lists M1.4 x 2mm, M2 x 2mm and M2 x 3mm, which match lengths in the records above.