Dell Inspiron 27 7775 Aio screw size
M2 / M3 / M4 · 3.5 to 6 mm long
The screws used on Dell Inspiron 27 7775 Aio are M2, M3 and M4 in lengths from 3.5 to 6 mm.
There are 19 separate fitment records for it, including power button (qty 2) (M2), SSD (qty 1) (M2) and wireless card (qty 1) (M2), plus 16 more in the table below.
19 of the 19 records are marked confirmed, drawn from 1 source (dl.dell.com).
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Dell Inspiron 27 7775 Aio 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 | 3.5 mm | 0.4 mm | not stated | not stated | Power button (qty 2) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | SSD (qty 1) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Unspecified (qty 4) | Confirmed |
| M3 | 3.5 mm | 0.5 mm | not stated | not stated | Hard drive (qty 3) | Confirmed |
| M3 | 4 mm | 0.5 mm | not stated | not stated | Unspecified (qty 4) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | I/O board (qty 4) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Bracket (qty 9) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Camera (qty 2) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Card reader (qty 2) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Chassis/frame (qty 8) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Fan (qty 3) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Hard drive (qty 3) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Heat sink (qty 1, captive)captive | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | System board (qty 5) | Confirmed |
| M3 | 5 mm | 0.5 mm | not stated | not stated | Unspecified (qty 6) | Confirmed |
| M3 | 5.6 mm | 0.5 mm | not stated | not stated | Display bezel (qty 6) | Confirmed |
| M3 | 5.6 mm | 0.5 mm | not stated | not stated | Unspecified | Confirmed |
| M4 | 6 mm | 0.7 mm | not stated | not stated | Unspecified (qty 6) | Confirmed |
Fitment records and sources
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
Wireless card (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hard drive (qty 3)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Unspecified (qty 4)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
I/O board (qty 4)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Bracket (qty 9)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Camera (qty 2)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Card reader (qty 2)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Chassis/frame (qty 8)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Fan (qty 3)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Hard drive (qty 3)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Heat sink (qty 1, captive)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
System board (qty 5)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Unspecified (qty 6)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Display bezel (qty 6)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Unspecified
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Unspecified (qty 6)
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Laptop covers and brackets often mix two or three lengths of the same thread, so lay the screws out in the order they came out (a magnetic mat or a sheet of paper with the hole pattern drawn on it works).
- Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M3 / M4, 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 3.5–6 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 / M3 / M4
- 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).
- 3.5in desktop and enterprise hard drives are 6-32 UNC imperial, not M3 - only the 2.5in form factor is metric.
- Ideal Scope Mounting System manuals disagree between revisions (M4 vs M5 clamping screws) - check your own manual.
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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Dell Latitude 5530 Replacement Screws Sold Individually – M2 x 3mm, M2 x 4mm, M2.5 x 5mm Phillips Wafer Head, Black
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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Dell Inspiron 27 7775 Aio, closest length match first.
- Lenovo ThinkPad Edge E130 also M2 × 4 mm
- Lenovo ThinkPad P51s also M2 × 3.5 mm
- Lenovo ThinkPad P50s also M2 × 3.5 mm
- Lenovo V14 Gen 4 also M2 × 3.5 mm
- HP Compaq Presario M2000 also M2 × 4 mm
- Lenovo B50-70 also M2 × 4 mm
- HP Compaq 320 also M3 × 4 mm
- HP 2140 also M2 × 4 mm
Questions about Dell Inspiron 27 7775 Aio screws
- What size screw does Dell Inspiron 27 7775 Aio use?
- M2 × 3.5 mm for power button (qty 2); M2 × 3.5 mm for SSD (qty 1); M2 × 3.5 mm for wireless card (qty 1); M2 × 4 mm for unspecified (qty 4); M3 × 3.5 mm for hard drive (qty 3); M3 × 4 mm for unspecified (qty 4); M3 × 5 mm for I/O board (qty 4); M3 × 5 mm for bracket (qty 9); M3 × 5 mm for camera (qty 2); M3 × 5 mm for card reader (qty 2); M3 × 5 mm for chassis/frame (qty 8); M3 × 5 mm for fan (qty 3); M3 × 5 mm for hard drive (qty 3); M3 × 5 mm for heat sink (qty 1, captive); M3 × 5 mm for system board (qty 5); M3 × 5 mm for unspecified (qty 6); M3 × 5.6 mm for display bezel (qty 6); M3 × 5.6 mm for unspecified; M4 × 6 mm for unspecified (qty 6).
- How long are the screws in Dell Inspiron 27 7775 Aio?
- The records range from 3.5 to 6 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 Inspiron 27 7775 Aio?
- 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 Inspiron 27 7775 Aio?
- TechSpareWarehouse (our own store) lists M2 x 4mm, M3 x 4mm and M3 x 5mm, which match lengths in the records above.