HP ProBook 445 G1 screw size
M2 / M2.5 / M3 · 2 to 6 mm long
Our records put HP ProBook 445 G1 on M2, M2.5 and M3 screws in lengths from 2 to 6 mm.
There are 19 separate fitment records for it, including card reader (qty 2, broadhead, Phillips) (M2), power button (qty 1, broadhead, Phillips) (M2) and optical drive (qty 1, Phillips) (M2), plus 16 more in the table below.
Head and drive, as the sources state them: pan and shoulder screw heads and Phillips and Torx T8 drives.
19 of the 19 records are marked confirmed, drawn from 1 source (h10032.www1.hp.com).
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
HP ProBook 445 G1 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 | 2 mm | 0.4 mm | not stated | Phillips | Card reader (qty 2, broadhead, Phillips) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | Phillips | Power button (qty 1, broadhead, Phillips) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Optical drive (qty 1, Phillips) | Confirmed |
| M2 | 3 mm | 0.4 mm | Pan head | Phillips | Palm rest (qty 2, pan, Phillips) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Power button (qty 1, Phillips) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Unspecified (qty 2, Phillips) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | Phillips | Hard drive (qty 4, Phillips) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | Phillips | Hinge (qty 6, Phillips) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | Phillips | Wireless card (qty 2, Phillips) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Phillips | I/O board (qty 1, Phillips) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Phillips | Battery (qty 2, Phillips) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Phillips | Display (qty 2, Phillips) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Torx T8 | Hinge (qty 4, Torx T8) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Phillips | System board (qty 2, Phillips) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | Phillips | Keyboard (qty 2, Phillips) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | Phillips | Optical drive (qty 1, Phillips) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | Torx T8 | Palm rest (qty 9, Torx T8) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | Shoulder screw | Phillips | Speaker (qty 2, shoulder, Phillips) | Confirmed |
| M3 | 4 mm | 0.5 mm | not stated | Phillips | Hard drive (qty 4, Phillips) | Confirmed |
Fitment records and sources
Card reader (qty 2, broadhead, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Power button (qty 1, broadhead, Phillips)
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
Palm rest (qty 2, pan, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Power button (qty 1, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hard drive (qty 4, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 6, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Wireless card (qty 2, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
I/O board (qty 1, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Battery (qty 2, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 2, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 4, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 2, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Keyboard (qty 2, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Optical drive (qty 1, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 9, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Speaker (qty 2, shoulder, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive (qty 4, Phillips)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 / M3, 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: for pan head / shoulder screw screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The records span 2–6 mm, which means different positions take different lengths — match each hole to its own screw.
- 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.
- 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 / M3
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
- Suunto dive computer service manuals reference strap pins and battery compartment springs but do not explicitly cite a metric screw thread size in the sections reviewed; do not infer M2/M2.5 fitment for Suunto dive computer straps without direct confirmation.
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 445 G1, closest length match first.
- Lenovo ThinkPad X13 Yoga Gen 3 also M2 × 2 mm
- Dell Precision 5480 also M2 × 2 mm
- Lenovo ThinkPad P16 Gen 1 also M2 × 2 mm
- Lenovo ThinkPad T420si also M2 × 3 mm
- Lenovo ThinkPad X13 Yoga Gen 2 also M2 × 2 mm
- HP EliteBook 8540w also M2 × 3 mm
- Lenovo ThinkPad X200 / X201 series screw kit also M2 × 2 mm
- Lenovo ThinkPad L13 Gen3 / S2 Gen7 Hardware Maintenance Manual fasteners also M2 × 3 mm
Questions about HP ProBook 445 G1 screws
- What size screw does HP ProBook 445 G1 use?
- M2 × 2 mm for card reader (qty 2, broadhead, Phillips); M2 × 2 mm for power button (qty 1, broadhead, Phillips); M2 × 3 mm for optical drive (qty 1, Phillips); M2 × 3 mm for palm rest (qty 2, pan, Phillips); M2 × 3 mm for power button (qty 1, Phillips); M2 × 3 mm for unspecified (qty 2, Phillips); M2.5 × 3 mm for hard drive (qty 4, Phillips); M2.5 × 3 mm for hinge (qty 6, Phillips); M2.5 × 3 mm for wireless card (qty 2, Phillips); M2.5 × 4 mm for I/O board (qty 1, Phillips); M2.5 × 4 mm for battery (qty 2, Phillips); M2.5 × 4 mm for display (qty 2, Phillips); M2.5 × 4 mm for hinge (qty 4, Torx T8); M2.5 × 4 mm for system board (qty 2, Phillips); M2.5 × 6 mm for keyboard (qty 2, Phillips); M2.
- How long are the screws in HP ProBook 445 G1?
- The records range from 2 to 6 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 445 G1?
- 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 ProBook 445 G1?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2.5 x 3mm, which match lengths in the records above.