HP Compaq nw8440 screw size

HP Compaq nw8440 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.

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: for shoulder screw screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
5. The records span 2–13 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.

Pitch gauge · Screw size finder · Torque guide

More in Laptops & PCs

The same screw also fits

Devices whose records share a thread with HP Compaq nw8440, closest length match first.

• Lenovo ideapad Y910-17ISK also M2 × 2 mm
• Lenovo IdeaPad Z585 also M2 × 3 mm
• HP Compaq Evo N610v also M2 × 4 mm
• Motherboard M.2 heatsink shield also M2 × 3 mm
• Lenovo ThinkPad X230i also M2 × 3 mm
• Acer Aspire 7730 also M2 × 3 mm
• HP Spectre x360 also M2 × 2 mm
• Lenovo ThinkPad Edge E145 also M2 × 3 mm

Questions about HP Compaq nw8440 screws

What size screw does HP Compaq nw8440 use?

M2 × 2 mm for display (qty 2, black, Phillips); M2 × 2 mm for unspecified (qty 3, black, Phillips); M2 × 2 mm for wireless card (qty 3, Phillips); M2 × 3 mm for fan (qty 2, captive, silver, Phillips); M2 × 3 mm for optical drive (qty 2, silver, Phillips); M2 × 4 mm for memory (qty 1, Phillips); M2 × 4 mm for wireless card (qty 2, silver, Phillips); M2 × 5 mm for hard drive (qty 2, black, Phillips); M2 × 5 mm for memory (qty 1, black, Phillips); M2 × 5 mm for wireless card (qty 1, black, Phillips); M2 × 8 mm for heat sink (qty 4, captive, silver, Phillips); M2.5 × 10 mm for display (qty 4, black, Torx T8); M2.5 × 10 mm for keyboard (qty 2, black, Torx T8); M2.5 × 10 mm for palm rest (qty 11, .

How long are the screws in HP Compaq nw8440?

The records range from 2 to 13 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 nw8440?

The source lists a Phillips and Torx T8 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 nw8440?

TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 4mm, which match lengths in the records above.