HP Compaq 511 screw size

HP Compaq 511 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 2–11 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 511, closest length match first.

• Lenovo ThinkPad 600 also M2 × 3 mm
• HP ProBook 640 G4 also M2 × 2 mm
• Dell 15 DC15250 also M2 × 2 mm
• Dell Inspiron 16 7610 also M2 × 2 mm
• HP 530 also M2 × 2 mm
• Lenovo ThinkPad E31 also M2 × 3 mm
• ASUS Vivobook X1605/X1405 series M.2 SSD retention also M2 × 3 mm
• GPU retention bracket / VGA heatsink spring screws also M2 × 4 mm

Questions about HP Compaq 511 screws

What size screw does HP Compaq 511 use?

M2 × 2 mm for keyboard (broadhead, Phillips); M2 × 2 mm for palm rest (qty 6, broadhead, Torx T8); M2 × 3 mm for hinge (qty 8, Phillips); M2 × 3 mm for keyboard (qty 2, broadhead, Phillips); M2 × 3 mm for optical drive (qty 2, Phillips); M2 × 4 mm for palm rest (qty 2, Phillips); M2 × 5 mm for heat sink (qty 4, captive, Phillips); M2 × 6 mm for hard drive (qty 2, captive, Phillips); M2 × 6 mm for memory (captive, Phillips); M2.5 × 11 mm for hard drive (captive, Phillips); M2.5 × 4 mm for display (Phillips); M2.5 × 4 mm for speaker (qty 2, Phillips); M2.5 × 4 mm for system board (Phillips); M2.5 × 4 mm for unspecified (qty 2, Phillips); M2.5 × 4 mm for wireless card (qty 2, Phillips); M2.5 × .

How long are the screws in HP Compaq 511?

The records range from 2 to 11 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 511?

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 511?

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