HP 520 screw size

HP 520 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: 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.

Pitch gauge · Screw size finder · Torque guide

More in Laptops & PCs

The same screw also fits

Devices whose records share a thread with HP 520, closest length match first.

• Lenovo Yoga 500-15IBD also M2 × 4 mm
• Lenovo ThinkPad X60s also M2 × 3 mm
• Lenovo ThinkPad X61s also M2 × 3 mm
• Lenovo ThinkPad T16g Gen 3 also M2 × 4 mm
• Dell Latitude M.2 SSD also M2 × 3 mm
• Lenovo IdeaPad U330 Touch also M2 × 4 mm
• Lenovo ThinkPad T22 also M2 × 4 mm
• Dell Precision 7540 also M2 × 3 mm

Questions about HP 520 screws

What size screw does HP 520 use?

M2 × 3 mm for hinge (qty 4, Phillips); M2 × 3 mm for memory (qty 93, 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 × 4 mm for card reader (qty 2, Phillips); M2 × 4 mm for wireless card (qty 2, Phillips); M2 × 7 mm for card reader (qty 2, 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 91, 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 bezel (qty 8, .

How long are the screws in HP 520?

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 520?

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 520?

TechSpareWarehouse (our own store) lists M2 x 3mm, M2 x 4mm and M2.5 x 6mm, which match lengths in the records above.