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HP 255R 15.6 inch G10 screw size

M1.6 / M2 / M2.5 · 2 to 6 mm long

If you are replacing a screw on HP 255R 15.6 inch G10, the thread is M1.6, M2 and M2.5 in lengths from 2 to 6 mm.

There are 20 separate fitment records for it, including speaker (qty 2, Phillips) (M1.6), I/O board (qty 1, Phillips) (M2) and power button (qty 1, Phillips) (M2), plus 17 more in the table below.

Head and drive, as the sources state them: Phillips drive.

20 of the 20 records are marked confirmed, drawn from 1 source (kaas.hpcloud.hp.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.

HP 255R 15.6 inch G10 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
M1.62.5 mm0.35 mmnot statedPhillipsSpeaker (qty 2, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsI/O board (qty 1, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsPower button (qty 1, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsSystem board (qty 9, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsTouchpad (qty 3, broadhead, Phillips)Confirmed
M22 mm0.4 mmnot statedPhillipsUnspecified (qty 1, Phillips)Confirmed
M22.3 mm0.4 mmnot statedPhillipsWireless card (qty 1, Phillips)Confirmed
M22.5 mm0.4 mmnot statedPhillipsHinge (qty 2, Phillips)Confirmed
M22.5 mm0.4 mmnot statedPhillipsTouchpad (qty 4, Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsI/O board (qty 1, Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsBattery (qty 5, Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsSSD (qty 1, Phillips)Confirmed
M23.5 mm0.4 mmnot statedPhillipsFan (qty 3, Phillips)Confirmed
M23.5 mm0.4 mmnot statedPhillipsHeat sink (qty 4, Phillips)Confirmed
M24 mm0.4 mmnot statedPhillipsBase cover (qty 2, Phillips)Confirmed
M2.52.5 mm0.45 mmnot statedPhillipsHinge (qty 4, Phillips)Confirmed
M2.53.5 mm0.45 mmnot statedPhillipsHinge (qty 4, Phillips)Confirmed
M2.55 mm0.45 mmnot statedPhillipsDisplay (qty 6, Phillips)Confirmed
M2.55 mm0.45 mmnot statedPhillipsHinge (qty 3, Phillips)Confirmed
M2.56 mm0.45 mmnot statedPhillipsBase cover (qty 2, Phillips)Confirmed

Fitment records and sources

M1.62.5 mmconfirmed

Speaker (qty 2, Phillips)

pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5

M22 mmconfirmed

I/O board (qty 1, Phillips)

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

M22 mmconfirmed

Power button (qty 1, Phillips)

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

M22 mmconfirmed

System board (qty 9, Phillips)

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

M22 mmconfirmed

Touchpad (qty 3, broadhead, Phillips)

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

M22 mmconfirmed

Unspecified (qty 1, Phillips)

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

M22.3 mmconfirmed

Wireless card (qty 1, Phillips)

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

M22.5 mmconfirmed

Hinge (qty 2, Phillips)

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

M22.5 mmconfirmed

Touchpad (qty 4, Phillips)

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

M23 mmconfirmed

I/O board (qty 1, Phillips)

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

M23 mmconfirmed

Battery (qty 5, Phillips)

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

M23 mmconfirmed

SSD (qty 1, Phillips)

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

M23.5 mmconfirmed

Fan (qty 3, Phillips)

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

M23.5 mmconfirmed

Heat sink (qty 4, Phillips)

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

M24 mmconfirmed

Base cover (qty 2, Phillips)

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

M2.52.5 mmconfirmed

Hinge (qty 4, Phillips)

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

M2.53.5 mmconfirmed

Hinge (qty 4, Phillips)

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

M2.55 mmconfirmed

Display (qty 6, Phillips)

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

M2.55 mmconfirmed

Hinge (qty 3, Phillips)

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

M2.56 mmconfirmed

Base cover (qty 2, Phillips)

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

How to check the screw before you buy

  1. 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).
  2. 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.
  3. 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.
  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 2–6 mm, which means different positions take different lengths — match each hole to its own screw.
  6. Driver: the source names a Phillips drive. For comparison, standard M1.6 heads take PH00 (Phillips) or T4–T5 (Torx), or a 1.5 mm hex key.
  7. 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.
  • The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
  • M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.

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 HP 255R 15.6 inch G10, closest length match first.

Questions about HP 255R 15.6 inch G10 screws

What size screw does HP 255R 15.6 inch G10 use?
M1.6 × 2.5 mm for speaker (qty 2, Phillips); M2 × 2 mm for I/O board (qty 1, Phillips); M2 × 2 mm for power button (qty 1, Phillips); M2 × 2 mm for system board (qty 9, Phillips); M2 × 2 mm for touchpad (qty 3, broadhead, Phillips); M2 × 2 mm for unspecified (qty 1, Phillips); M2 × 2.3 mm for wireless card (qty 1, Phillips); M2 × 2.5 mm for hinge (qty 2, Phillips); M2 × 2.5 mm for touchpad (qty 4, Phillips); M2 × 3 mm for I/O board (qty 1, Phillips); M2 × 3 mm for battery (qty 5, Phillips); M2 × 3 mm for SSD (qty 1, Phillips); M2 × 3.5 mm for fan (qty 3, Phillips); M2 × 3.5 mm for heat sink (qty 4, Phillips); M2 × 4 mm for base cover (qty 2, Phillips); M2.5 × 2.5 mm for hinge (qty 4, Phillip.
How long are the screws in HP 255R 15.6 inch G10?
The records range from 2 to 6 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 HP 255R 15.6 inch G10?
The source lists a Phillips drive. Standard M1.6 heads otherwise take PH00 (Phillips) or T4–T5 (Torx), or 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 HP 255R 15.6 inch G10?
TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 2.5mm and M2 x 3mm, which match lengths in the records above.