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HP 500 screw size

M2 / M2.5 / M3 · 3 to 9 mm long

Our records put HP 500 on M2, M2.5 and M3 screws in lengths from 3 to 9 mm.

There are 20 separate fitment records for it, including card reader (qty 2, Phillips) (M2), hinge (qty 4, Phillips) (M2) and memory (qty 87, 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 (tim.id.au).

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.

HP 500 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
M23 mm0.4 mmnot statedPhillipsCard reader (qty 2, Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsHinge (qty 4, Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsMemory (qty 87, Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsOptical drive (qty 2, Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsSystem board (Phillips)Confirmed
M23 mm0.4 mmnot statedPhillipsUnspecified (qty 7, Phillips)Confirmed
M27 mm0.4 mmnot statedPhillipsDisplay (qty 2, Phillips)Confirmed
M29 mm0.4 mmnot statedPhillipsDisplay (qty 2, Phillips)Confirmed
M29 mm0.4 mmnot statedPhillipsFan (Phillips)Confirmed
M29 mm0.4 mmnot statedPhillipsKeyboard (qty 2, Phillips)Confirmed
M29 mm0.4 mmnot statedPhillipsMemory (qty 85, Phillips)Confirmed
M29 mm0.4 mmnot statedPhillipsOptical drive (Phillips)Confirmed
M29 mm0.4 mmnot statedPhillipsSpeaker (Phillips)Confirmed
M29 mm0.4 mmnot statedPhillipsUnspecified (qty 7, Phillips)Confirmed
M2.56 mm0.45 mmnot statedPhillipsDisplay (qty 8, Phillips)Confirmed
M2.56 mm0.45 mmnot statedPhillipsHeat sink (qty 4, Phillips)Confirmed
M2.56 mm0.45 mmnot statedPhillipsUnspecified (qty 89, Phillips)Confirmed
M2.58 mm0.45 mmnot statedPhillipsHard drive (qty 2, Phillips)Confirmed
M2.58 mm0.45 mmnot statedPhillipsMemory (qty 81, captive, Phillips)captiveConfirmed
M33 mm0.5 mmnot statedPhillipsHard drive (qty 4, Phillips)Confirmed

Fitment records and sources

M23 mmconfirmed

Card reader (qty 2, Phillips)

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

M23 mmconfirmed

Hinge (qty 4, Phillips)

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

M23 mmconfirmed

Memory (qty 87, Phillips)

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

M23 mmconfirmed

Optical drive (qty 2, Phillips)

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

M23 mmconfirmed

System board (Phillips)

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

M23 mmconfirmed

Unspecified (qty 7, Phillips)

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

M27 mmconfirmed

Display (qty 2, Phillips)

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

M29 mmconfirmed

Display (qty 2, Phillips)

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

M29 mmconfirmed

Fan (Phillips)

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

M29 mmconfirmed

Keyboard (qty 2, Phillips)

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

M29 mmconfirmed

Memory (qty 85, Phillips)

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

M29 mmconfirmed

Optical drive (Phillips)

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

M29 mmconfirmed

Speaker (Phillips)

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

M29 mmconfirmed

Unspecified (qty 7, Phillips)

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

M2.56 mmconfirmed

Display (qty 8, Phillips)

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

M2.56 mmconfirmed

Heat sink (qty 4, Phillips)

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

M2.56 mmconfirmed

Unspecified (qty 89, Phillips)

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

M2.58 mmconfirmed

Hard drive (qty 2, Phillips)

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

M2.58 mmconfirmed

Memory (qty 81, captive, Phillips)

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

M33 mmconfirmed

Hard drive (qty 4, Phillips)

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 3–9 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 M2 heads take PH0 (Phillips) or T6 (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 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

  • 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.
  • Thorlabs' 16mm cage system standard plates use dual 4-40 (UNC) and M3 taps on the same plate (e.g., SP01), so metric and imperial fasteners are both valid depending on the region/kit purchased.

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 500, closest length match first.

Questions about HP 500 screws

What size screw does HP 500 use?
M2 × 3 mm for card reader (qty 2, Phillips); M2 × 3 mm for hinge (qty 4, Phillips); M2 × 3 mm for memory (qty 87, Phillips); M2 × 3 mm for optical drive (qty 2, Phillips); M2 × 3 mm for system board (Phillips); M2 × 3 mm for unspecified (qty 7, Phillips); M2 × 7 mm for display (qty 2, Phillips); M2 × 9 mm for display (qty 2, Phillips); M2 × 9 mm for fan (Phillips); M2 × 9 mm for keyboard (qty 2, Phillips); M2 × 9 mm for memory (qty 85, Phillips); M2 × 9 mm for optical drive (Phillips); M2 × 9 mm for speaker (Phillips); M2 × 9 mm for unspecified (qty 7, Phillips); M2.5 × 6 mm for display (qty 8, Phillips); M2.5 × 6 mm for heat sink (qty 4, Phillips); M2.5 × 6 mm for unspecified (qty 89, Phill.
How long are the screws in HP 500?
The records range from 3 to 9 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 HP 500?
The source lists a Phillips drive. Standard M2 heads otherwise take PH0 (Phillips) or T6 (Torx), or 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 HP 500?
TechSpareWarehouse (our own store) lists M2 x 3mm, M2.5 x 6mm and M2.5 x 8mm, which match lengths in the records above.