HP Compaq nx8420 screw size

HP Compaq nx8420 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. 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: 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 nx8420, closest length match first.

• Dell Latitude 3310 also M2 × 2 mm
• Dell Inspiron 14 5406 2-in-1 also M2 × 2 mm
• HP OMEN 17.3 inch Gaming 17-ck0000 also M2 × 2 mm
• Lenovo ThinkPad T14s 2-in-1 Gen 1 also M2 × 3 mm
• Lenovo ThinkPad SL400c also M2 × 3 mm
• HP Pavilion ze2200 PC Compaq Presario M2200 also M2 × 3 mm
• Lenovo Y400 also M2 × 2 mm
• Lenovo ThinkPad T15p Gen 3 also M2 × 2 mm

Questions about HP Compaq nx8420 screws

What size screw does HP Compaq nx8420 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 nx8420?

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 nx8420?

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 nx8420?

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