HP ProBook 655 G2 screw size
M2 / M2.5 · 1.5 to 8 mm long
Our records put HP ProBook 655 G2 on M2 and M2.5 screws in lengths from 1.5 to 8 mm.
There are 16 separate fitment records for it, including palm rest (qty 2) (M2), unspecified (qty 2, Torx T8) (M2) and I/O board (qty 2) (M2), plus 13 more in the table below.
Head and drive, as the sources state them: Torx T8 and Phillips drives.
16 of the 16 records are marked confirmed, drawn from 1 source (h10032.www1.hp.com).
An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
HP ProBook 655 G2 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.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M2 | 1.5 mm | 0.4 mm | not stated | not stated | Palm rest (qty 2) | Confirmed |
| M2 | 1.5 mm | 0.4 mm | not stated | Torx T8 | Unspecified (qty 2, Torx T8) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | I/O board (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Display (qty 4) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Power button (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | System board (qty 4, captive)captive | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Torx T8 | Unspecified (qty 2, Torx T8) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Keyboard (qty 3) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Hinge (qty 2) | Confirmed |
| M2 | 8 mm | 0.4 mm | not stated | not stated | Hard drive (qty 4, captive)captive | Confirmed |
| M2 | 8 mm | 0.4 mm | not stated | Phillips | Optical drive (qty 1, Phillips) | Confirmed |
| M2 | 8 mm | 0.4 mm | not stated | Phillips | SSD (qty 1, Phillips) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Display | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Base cover (qty 8) | Confirmed |
| M2.5 | 8 mm | 0.45 mm | not stated | Torx T8 | Unspecified (qty 2, Torx T8) | Confirmed |
Fitment records and sources
Palm rest (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, Torx T8)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O board (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Power button (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 4, captive)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, Torx T8)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hinge (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hard drive (qty 4, captive)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Optical drive (qty 1, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 1, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Base cover (qty 8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 2, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- 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.
- Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M2.5, so measure each screw rather than assuming they match.
- 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.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The records span 1.5–8 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source names a Torx T8 drive. For comparison, standard M2 heads take PH0 (Phillips) or T6 (Torx), or a 1.5 mm hex key.
- 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.
Common mix-ups with M2 / M2.5
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- M.2 SSD mounting screws (M2 x 3mm) are frequently mislabeled generically as 'M.2 screws' which can be confused with the M2 metric thread designation — they do coincide numerically here but are conceptually distinct (M.2 = card format, M2 = thread size).
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with HP ProBook 655 G2, closest length match first.
- HP Pavilion dv6000 also M2 × 3 mm
- Lenovo B51-80 also M2 × 3 mm
- Dell Alienware x17 R2 also M2 × 3 mm
- HP Compaq Evo N600c also M2 × 4 mm
- Lenovo ZhaoYang E49 also M2 × 3 mm
- Lenovo Yoga Slim 7 14AKP10 also M2 × 3 mm
- Acer Swift / Aspire palmrest also M2 × 3 mm
- Dell Inspiron 5160 also M2 × 3 mm
Questions about HP ProBook 655 G2 screws
- What size screw does HP ProBook 655 G2 use?
- M2 × 1.5 mm for palm rest (qty 2); M2 × 1.5 mm for unspecified (qty 2, Torx T8); M2 × 3 mm for I/O board (qty 2); M2 × 3 mm for display (qty 4); M2 × 3 mm for power button (qty 2); M2 × 3 mm for system board (qty 4, captive); M2 × 3 mm for unspecified (qty 2, Torx T8); M2 × 3 mm for wireless card (qty 1); M2 × 4 mm for keyboard (qty 3); M2 × 5 mm for hinge (qty 2); M2 × 8 mm for hard drive (qty 4, captive); M2 × 8 mm for optical drive (qty 1, Phillips); M2 × 8 mm for SSD (qty 1, Phillips); M2.5 × 2.5 mm for display; M2.5 × 6 mm for base cover (qty 8); M2.5 × 8 mm for unspecified (qty 2, Torx T8).
- How long are the screws in HP ProBook 655 G2?
- The records range from 1.5 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 ProBook 655 G2?
- The source lists a Torx T8 and 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 ProBook 655 G2?
- TechSpareWarehouse (our own store) lists M2 x 3mm, M2 x 4mm and M2 x 5mm, which match lengths in the records above.