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Dell Inspiron 15 5566 screw size

M2 / M2.5 / M3 · 2 to 8 mm long

Dell Inspiron 15 5566 takes M2, M2.5 and M3 metric screws in lengths from 2 to 8 mm.

There are 24 separate fitment records for it, including power button (qty 1, broadhead) (M2), unspecified (qty 3, broadhead) (M2) and display (qty 4) (M2), plus 21 more in the table below.

24 of the 24 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 Inspiron 15 5566 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.

ThreadLengthPitchHeadDriveWhere it goesStatus
M22 mm0.4 mmnot statednot statedPower button (qty 1, broadhead)Confirmed
M22 mm0.4 mmnot statednot statedUnspecified (qty 3, broadhead)Confirmed
M22.5 mm0.4 mmnot statednot statedDisplay (qty 4)Confirmed
M22.5 mm0.4 mmnot statednot statedHinge (qty 4)Confirmed
M23 mm0.4 mmnot statednot statedDC-in (qty 1)Confirmed
M23 mm0.4 mmnot statednot statedHeat sink (qty 3, captive)captiveConfirmed
M23 mm0.4 mmnot statednot statedOptical drive (qty 2)Confirmed
M23 mm0.4 mmnot statednot statedSystem board (qty 1)Confirmed
M23 mm0.4 mmnot statednot statedTouchpad (qty 3)Confirmed
M23 mm0.4 mmnot statednot statedUnspecified (qty 1)Confirmed
M23 mm0.4 mmnot statednot statedWireless card (qty 1)Confirmed
M25 mm0.4 mmnot statednot statedOptical drive (qty 1)Confirmed
M25 mm0.4 mmnot statednot statedUnspecified (qty 3, broadhead)Confirmed
M2.52.5 mm0.45 mmnot statednot statedHinge (qty 6, broadhead)Confirmed
M2.53 mm0.45 mmnot statednot statedHinge (qty 4, broadhead)Confirmed
M2.55 mm0.45 mmnot statednot statedI/O board (qty 1)Confirmed
M2.55 mm0.45 mmnot statednot statedKeyboard (qty 6)Confirmed
M2.55 mm0.45 mmnot statednot statedUnspecified (qty 6, broadhead)Confirmed
M2.58 mm0.45 mmnot statednot statedBase cover (qty 2)Confirmed
M2.58 mm0.45 mmnot statednot statedDisplay (qty 4)Confirmed
M2.58 mm0.45 mmnot statednot statedHard drive (qty 4)Confirmed
M2.58 mm0.45 mmnot statednot statedHinge (qty 4)Confirmed
M2.58 mm0.45 mmnot statednot statedUnspecified (qty 8)Confirmed
M33 mm0.5 mmnot statednot statedHard drive (qty 4)Confirmed

Fitment records and sources

M22 mmconfirmed

Power button (qty 1, broadhead)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22 mmconfirmed

Unspecified (qty 3, broadhead)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22.5 mmconfirmed

Display (qty 4)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M22.5 mmconfirmed

Hinge (qty 4)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M23 mmconfirmed

DC-in (qty 1)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M23 mmconfirmed

Heat sink (qty 3, captive)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M23 mmconfirmed

Optical drive (qty 2)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M23 mmconfirmed

System board (qty 1)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M23 mmconfirmed

Touchpad (qty 3)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M23 mmconfirmed

Unspecified (qty 1)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M23 mmconfirmed

Wireless card (qty 1)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M25 mmconfirmed

Optical drive (qty 1)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M25 mmconfirmed

Unspecified (qty 3, broadhead)

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

M2.52.5 mmconfirmed

Hinge (qty 6, broadhead)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.53 mmconfirmed

Hinge (qty 4, broadhead)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.55 mmconfirmed

I/O board (qty 1)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.55 mmconfirmed

Keyboard (qty 6)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.55 mmconfirmed

Unspecified (qty 6, broadhead)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.58 mmconfirmed

Base cover (qty 2)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.58 mmconfirmed

Display (qty 4)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.58 mmconfirmed

Hard drive (qty 4)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.58 mmconfirmed

Hinge (qty 4)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M2.58 mmconfirmed

Unspecified (qty 8)

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

M33 mmconfirmed

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

  1. 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.
  2. 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.
  3. 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.
  4. Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
  5. The records span 2–8 mm, which means different positions take different lengths — match each hole to its own screw.
  6. 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.
  7. 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

  • 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.
  • 3.5in desktop and enterprise hard drives are 6-32 UNC imperial, not M3 - only the 2.5in form factor is metric.

Pitch gauge · Screw size finder · Torque guide

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 Inspiron 15 5566, closest length match first.

Questions about Dell Inspiron 15 5566 screws

What size screw does Dell Inspiron 15 5566 use?
M2 × 2 mm for power button (qty 1, broadhead); M2 × 2 mm for unspecified (qty 3, broadhead); M2 × 2.5 mm for display (qty 4); M2 × 2.5 mm for hinge (qty 4); M2 × 3 mm for DC-in (qty 1); M2 × 3 mm for heat sink (qty 3, captive); M2 × 3 mm for optical drive (qty 2); M2 × 3 mm for system board (qty 1); M2 × 3 mm for touchpad (qty 3); M2 × 3 mm for unspecified (qty 1); M2 × 3 mm for wireless card (qty 1); M2 × 5 mm for optical drive (qty 1); M2 × 5 mm for unspecified (qty 3, broadhead); M2.5 × 2.5 mm for hinge (qty 6, broadhead); M2.5 × 3 mm for hinge (qty 4, broadhead); M2.5 × 5 mm for I/O board (qty 1); M2.5 × 5 mm for keyboard (qty 6); M2.5 × 5 mm for unspecified (qty 6, broadhead); M2.5 × 8 .
How long are the screws in Dell Inspiron 15 5566?
The records range from 2 to 8 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 15 5566?
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 15 5566?
TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 2.5mm and M2 x 3mm, which match lengths in the records above.