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HP Compaq 6520s screw size

M2 / M2.5 / M3 · 2 to 12 mm long

The screws used on HP Compaq 6520s are M2, M2.5 and M3 in lengths from 2 to 12 mm.

There are 26 separate fitment records for it, including palm rest (qty 3, broadhead, black, Phillips,Torx T8) (M2), hinge (qty 4, Phillips) (M2) and optical drive (qty 2, silver, Phillips) (M2), plus 23 more in the table below.

Head and drive, as the sources state them: Torx T8 and Phillips drives.

26 of the 26 records are marked confirmed, drawn from 1 source (h10032.www1.hp.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.

HP Compaq 6520s 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 statedTorx T8Palm rest (qty 3, broadhead, black, Phillips,Torx T8)black finishConfirmed
M24 mm0.4 mmnot statedPhillipsHinge (qty 4, Phillips)Confirmed
M24 mm0.4 mmnot statedPhillipsOptical drive (qty 2, silver, Phillips)Confirmed
M24 mm0.4 mmnot statedPhillipsTouchpad (qty 2, Phillips)Confirmed
M24 mm0.4 mmnot statedPhillipsWireless card (qty 2, Phillips)Confirmed
M25 mm0.4 mmnot statedPhillipsHard drive (qty 2, captive, black, Phillips)black finish, captiveConfirmed
M25 mm0.4 mmnot statedPhillipsMemory (qty 1, captive, Phillips)captiveConfirmed
M25 mm0.4 mmnot statedPhillipsWireless card (qty 1, captive, Phillips)captiveConfirmed
M26 mm0.4 mmnot statedTorx T8System board (qty 1, black, Phillips,Torx T8)black finishConfirmed
M28 mm0.4 mmnot statedPhillipsCard reader (qty 2, black, Phillips)black finishConfirmed
M2.510 mm0.45 mmnot statedPhillipsHeat sink (qty 6, captive, silver, Phillips)captiveConfirmed
M2.512 mm0.45 mmnot statedPhillipsHard drive (qty 1, captive, silver, Phillips)captiveConfirmed
M2.53 mm0.45 mmnot statedTorx T8Keyboard (qty 3, broadhead, Torx T8)Confirmed
M2.53 mm0.45 mmnot statedTorx T8Unspecified (qty 2, black, Torx T8)black finishConfirmed
M2.54 mm0.45 mmnot statedTorx T8Speaker (qty 2, black, Torx T8)black finishConfirmed
M2.54 mm0.45 mmnot statedTorx T8System board (qty 1, Torx T8)Confirmed
M2.54 mm0.45 mmnot statedPhillipsUnspecified (qty 2, Phillips)Confirmed
M2.54 mm0.45 mmnot statedPhillipsWireless card (qty 2, black, Phillips)black finishConfirmed
M2.56 mm0.45 mmnot statedTorx T8Display (qty 2, Torx T8)Confirmed
M2.56 mm0.45 mmnot statedTorx T8Display bezel (qty 8, black, Torx T8)black finishConfirmed
M2.57 mm0.45 mmnot statedTorx T8Display (qty 2, Torx T8)Confirmed
M2.57 mm0.45 mmnot statedPhillipsFan (qty 1, captive, black,silver, Phillips)black finish, captiveConfirmed
M2.57 mm0.45 mmnot statedTorx T8Keyboard (qty 2, Torx T8)Confirmed
M2.57 mm0.45 mmnot statedTorx T8Optical drive (qty 1, black, Torx T8)black finishConfirmed
M2.57 mm0.45 mmnot statedTorx T8Palm rest (qty 7, Torx T8)Confirmed
M34 mm0.5 mmnot statedPhillipsHard drive (qty 4, silver, Phillips)Confirmed

Fitment records and sources

M22 mmconfirmed

Palm rest (qty 3, broadhead, black, Phillips,Torx T8)

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

M24 mmconfirmed

Hinge (qty 4, Phillips)

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

M24 mmconfirmed

Optical drive (qty 2, silver, Phillips)

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

M24 mmconfirmed

Touchpad (qty 2, Phillips)

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

M24 mmconfirmed

Wireless card (qty 2, Phillips)

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

M25 mmconfirmed

Hard drive (qty 2, captive, black, Phillips)

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

M25 mmconfirmed

Memory (qty 1, captive, Phillips)

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

M25 mmconfirmed

Wireless card (qty 1, captive, Phillips)

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

M26 mmconfirmed

System board (qty 1, black, Phillips,Torx T8)

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

M28 mmconfirmed

Card reader (qty 2, black, Phillips)

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

M2.510 mmconfirmed

Heat sink (qty 6, captive, silver, Phillips)

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

M2.512 mmconfirmed

Hard drive (qty 1, captive, silver, Phillips)

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

M2.53 mmconfirmed

Keyboard (qty 3, broadhead, Torx T8)

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

M2.53 mmconfirmed

Unspecified (qty 2, black, Torx T8)

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

M2.54 mmconfirmed

Speaker (qty 2, black, Torx T8)

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

M2.54 mmconfirmed

System board (qty 1, Torx T8)

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

M2.54 mmconfirmed

Unspecified (qty 2, Phillips)

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

M2.54 mmconfirmed

Wireless card (qty 2, black, Phillips)

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

M2.56 mmconfirmed

Display (qty 2, Torx T8)

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

M2.56 mmconfirmed

Display bezel (qty 8, black, Torx T8)

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

M2.57 mmconfirmed

Display (qty 2, Torx T8)

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

M2.57 mmconfirmed

Fan (qty 1, captive, black,silver, Phillips)

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

M2.57 mmconfirmed

Keyboard (qty 2, Torx T8)

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

M2.57 mmconfirmed

Optical drive (qty 1, black, Torx T8)

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

M2.57 mmconfirmed

Palm rest (qty 7, Torx T8)

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

M34 mmconfirmed

Hard drive (qty 4, silver, 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. 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 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 2–12 mm, which means different positions take different lengths — match each hole to its own screw.
  6. Driver: the source names a Torx T8 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

  • 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).
  • M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
  • 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 HP Compaq 6520s, closest length match first.

Questions about HP Compaq 6520s screws

What size screw does HP Compaq 6520s use?
M2 × 2 mm for palm rest (qty 3, broadhead, black, Phillips,Torx T8); M2 × 4 mm for hinge (qty 4, Phillips); M2 × 4 mm for optical drive (qty 2, silver, Phillips); M2 × 4 mm for touchpad (qty 2, Phillips); M2 × 4 mm for wireless card (qty 2, Phillips); M2 × 5 mm for hard drive (qty 2, captive, black, Phillips); M2 × 5 mm for memory (qty 1, captive, Phillips); M2 × 5 mm for wireless card (qty 1, captive, Phillips); M2 × 6 mm for system board (qty 1, black, Phillips,Torx T8); M2 × 8 mm for card reader (qty 2, black, Phillips); M2.5 × 10 mm for heat sink (qty 6, captive, silver, Phillips); M2.5 × 12 mm for hard drive (qty 1, captive, silver, Phillips); M2.5 × 3 mm for keyboard (qty 3, broadhead,.
How long are the screws in HP Compaq 6520s?
The records range from 2 to 12 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 Compaq 6520s?
The source lists a Torx T8 and 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 Compaq 6520s?
TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 4mm and M2 x 5mm, which match lengths in the records above.