HP Compaq nc6400 screw size
M2 / M2.5 / M3 · 2 to 13 mm long
HP Compaq nc6400 takes M2, M2.5 and M3 metric screws in lengths from 2 to 13 mm.
There are 37 separate fitment records for it, including heat sink (qty 4, Phillips) (M2), heat sink (qty 2, Phillips) (M2) and unspecified (qty 4, black, Phillips) (M2), plus 34 more in the table below.
Head and drive, as the sources state them: Phillips and Torx T8 drives.
37 of the 37 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 Compaq nc6400 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 | 10 mm | 0.4 mm | not stated | Phillips | Heat sink (qty 4, Phillips) | Confirmed |
| M2 | 13 mm | 0.4 mm | not stated | Phillips | Heat sink (qty 2, Phillips) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | Phillips | Unspecified (qty 4, black, Phillips)black finish | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | Phillips | Wireless card (qty 4, Phillips) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Display (qty 4, Phillips) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Wireless card (qty 2, silver, Phillips) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | Phillips | Hard drive (qty 2, black, Phillips)black finish | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | Phillips | Memory (qty 1, black, Phillips)black finish | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | Phillips | Wireless card (qty 1, black, Phillips)black finish | Confirmed |
| M2 | 6 mm | 0.4 mm | not stated | Phillips | Memory (qty 2, Phillips) | Confirmed |
| M2 | 6 mm | 0.4 mm | not stated | Phillips | System board (qty 2, silver, Phillips) | Confirmed |
| M2 | 6 mm | 0.4 mm | not stated | Phillips | Unspecified (qty 2, silver, Phillips) | Confirmed |
| M2.5 | 10 mm | 0.45 mm | not stated | Phillips | Heat sink (qty 4, silver, Phillips) | Confirmed |
| M2.5 | 11 mm | 0.45 mm | not stated | Torx T8 | Display (qty 2, black, Torx T8)black finish | Confirmed |
| M2.5 | 11 mm | 0.45 mm | not stated | Torx T8 | Keyboard (qty 3, black, Torx T8)black finish | Confirmed |
| M2.5 | 11 mm | 0.45 mm | not stated | Torx T8 | Palm rest (qty 9, black, Torx T8)black finish | Confirmed |
| M2.5 | 11 mm | 0.45 mm | not stated | Torx T8 | Unspecified (qty 2, black, Torx T8)black finish | Confirmed |
| M2.5 | 11 mm | 0.45 mm | not stated | Phillips | Wireless card (qty 2, Phillips) | Confirmed |
| M2.5 | 13 mm | 0.45 mm | not stated | Phillips | Hard drive (qty 1, captive, silver, Phillips)captive | Confirmed |
| M2.5 | 13 mm | 0.45 mm | not stated | Phillips | Heat sink (qty 2, silver, Phillips) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Torx T8 | Display (qty 2, Torx T8) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Phillips | Hinge (qty 2, silver, Phillips) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Phillips | Power button (qty 2, silver, Phillips) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | Torx T8 | Wireless card (qty 2, silver, Torx T8) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | Phillips | Card reader (qty 3, black, Phillips)black finish | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | Phillips | Display (qty 3, black, Phillips)black finish | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | Phillips | Palm rest (qty 3, black, Phillips)black finish | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | Phillips | System board (qty 4, black, Phillips)black finish | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | Phillips | Unspecified (qty 1, black, Phillips)black finish | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | Phillips | Wireless card (qty 1, Phillips) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | Phillips | Display (qty 4, silver, Phillips) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | Phillips | Display bezel (qty 4, silver, Phillips) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | Phillips | Hinge (qty 2, silver, Phillips) | Confirmed |
| M2.5 | 7 mm | 0.45 mm | not stated | Torx T8 | Display (qty 2, black, Torx T8)black finish | Confirmed |
| M2.5 | 7 mm | 0.45 mm | not stated | Torx T8 | Fan (qty 1, black, Torx T8)black finish | Confirmed |
| M2.5 | 7 mm | 0.45 mm | not stated | Torx T8 | Palm rest (qty 2, black, Torx T8)black finish | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | Phillips | Hard drive (qty 4, black, Phillips)black finish | Confirmed |
Fitment records and sources
Heat sink (qty 4, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Heat sink (qty 2, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 4, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 4, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 2, silver, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hard drive (qty 2, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Memory (qty 1, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 1, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Memory (qty 2, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 2, silver, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, silver, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Heat sink (qty 4, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 2, black, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Keyboard (qty 3, black, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 9, black, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 2, black, Torx T8)
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
Hard drive (qty 1, captive, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Heat sink (qty 2, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 2, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 2, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Power button (qty 2, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Wireless card (qty 2, silver, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Card reader (qty 3, black, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 3, black, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 3, black, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 4, black, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 1, black, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Wireless card (qty 1, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 4, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display bezel (qty 4, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hinge (qty 2, silver, Phillips)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 2, black, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Fan (qty 1, black, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 2, black, Torx T8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive (qty 4, black, 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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The records span 2–13 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.
- Thorlabs' 16mm cage system standard plates use dual 4-40 (UNC) and M3 taps on the same plate (e.g., SP01), so metric and imperial fasteners are both valid depending on the region/kit purchased.
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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The same screw also fits
Devices whose records share a thread with HP Compaq nc6400, closest length match first.
- Lenovo Flex 3-1570 also M2 × 6 mm
- Lenovo IdeaPad U310 also M2 × 3 mm
- HP Chromebook 14 G5 (id 10477110) also M2 × 3 mm
- Lenovo ideapad 320L-17ISK also M2 × 3 mm
- Lenovo ideapad S530-13IWL also M2 × 2 mm
- Dell Inspiron 14 3481 also M2 × 2 mm
- HP Mini 2102 also M2 × 6 mm
- HP EliteBook Revolve 810 G3 also M2 × 3 mm
Questions about HP Compaq nc6400 screws
- What size screw does HP Compaq nc6400 use?
- M2 × 10 mm for heat sink (qty 4, Phillips); M2 × 13 mm for heat sink (qty 2, Phillips); M2 × 2 mm for unspecified (qty 4, black, Phillips); M2 × 2 mm for wireless card (qty 4, Phillips); M2 × 3 mm for display (qty 4, Phillips); M2 × 3 mm for wireless card (qty 2, silver, Phillips); M2 × 5 mm for hard drive (qty 2, black, Phillips); M2 × 5 mm for memory (qty 1, black, Phillips); M2 × 5 mm for wireless card (qty 1, black, Phillips); M2 × 6 mm for memory (qty 2, Phillips); M2 × 6 mm for system board (qty 2, silver, Phillips); M2 × 6 mm for unspecified (qty 2, silver, Phillips); M2.5 × 10 mm for heat sink (qty 4, silver, Phillips); M2.5 × 11 mm for display (qty 2, black, Torx T8); M2.5 × 11 mm f.
- How long are the screws in HP Compaq nc6400?
- The records range from 2 to 13 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 nc6400?
- 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 nc6400?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 5mm, which match lengths in the records above.