HP 255 G9 screw size

HP 255 G9 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 2.5–8 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 255 G9, closest length match first.

• HP ProBook 455 G7 also M2 × 2.5 mm
• Lenovo ThinkPad S5 2nd Generation also M2 × 4 mm
• HP EliteBook 8730w also M2 × 4 mm
• HP Omen fans and heatsink also M2 × 4 mm
• Lenovo YOGA C630-13Q50 also M2 × 2.5 mm
• Dell G7 17 7700 also M2 × 2.5 mm
• HP ProBook 470 G3 also M2 × 4 mm
• Lenovo IdeaPad 3-15IAN8 lower cover screw also M2 × 4 mm

Questions about HP 255 G9 screws

What size screw does HP 255 G9 use?

M2 × 2.5 mm for SSD (qty 1, Phillips); M2 × 2.5 mm for wireless card (qty 1, Phillips); M2 × 2.8 mm for I/O board (qty 2, Phillips); M2 × 2.8 mm for battery (qty 4, Phillips); M2 × 2.8 mm for card reader (qty 1, Phillips); M2 × 2.8 mm for hard drive (qty 3, Phillips); M2 × 2.8 mm for heat sink (qty 4, Phillips); M2 × 2.8 mm for hinge (qty 1, Phillips); M2 × 2.8 mm for power button (qty 1, Phillips); M2 × 2.8 mm for SSD (qty 3, Phillips); M2 × 2.8 mm for system board (qty 3, Phillips); M2 × 2.8 mm for touchpad (qty 2, Phillips); M2 × 4 mm for base cover (qty 2, Phillips); M2 × 4 mm for fan (qty 1, Phillips); M2.5 × 3.5 mm for hinge (qty 3, Phillips); M2.5 × 6 mm for display (qty 4, Phillips);.

How long are the screws in HP 255 G9?

The records range from 2.5 to 8 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 255 G9?

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 255 G9?

TechSpareWarehouse (our own store) lists M2 x 2.5mm, M2 x 3mm and M2 x 4mm, which match lengths in the records above.