HP Pavilion 4100 screw size
M2 / M2.5 / M3 / M5 · 3 to 10 mm long
The screws used on HP Pavilion 4100 are M2, M2.5, M3 and M5 in lengths from 3 to 10 mm.
There are 23 separate fitment records for it, including display bezel (qty 1) (M2), unspecified (qty 2, flat) (M2) and system board (qty 2) (M2), plus 20 more in the table below.
Head and drive, as the sources state them: shoulder screw head.
23 of the 23 records are marked confirmed, drawn from 1 source (tim.id.au).
M2 means a 2 mm nominal diameter with a 0.4 mm thread pitch. Imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
HP Pavilion 4100 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 | 3 mm | 0.4 mm | not stated | not stated | Display bezel (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified (qty 2, flat) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Heat sink (qty 4) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Hard drive (qty 2) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Heat sink (qty 3) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Keyboard (qty 4) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Palm rest (qty 4) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | System board (qty 4) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Unspecified (qty 2) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Wireless card | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Display (qty 6) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Display bezel (qty 4) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Hard drive | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Optical drive (qty 3) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Palm rest (qty 16) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Speaker (qty 1) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | System board (qty 3) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Unspecified (qty 3) | Confirmed |
| M2.5 | 7 mm | 0.45 mm | not stated | not stated | Palm rest (qty 16) | Confirmed |
| M3 | 4 mm | 0.5 mm | not stated | not stated | Hard drive (qty 4) | Confirmed |
| M5 | 10 mm | 0.8 mm | Shoulder screw | not stated | System board (qty 4, shoulder) | Confirmed |
Fitment records and sources
Display bezel (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, flat)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Heat sink (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hard drive (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Heat sink (qty 3)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Keyboard (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Wireless card
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 6)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display bezel (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Optical drive (qty 3)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 16)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Speaker (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 3)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 3)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Palm rest (qty 16)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive (qty 4)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
System board (qty 4, shoulder)
pitch 0.8 mm · tap 4.2 mm · clearance 5.5 mm · PH2 / Torx T25
How to check the screw before you buy
- Laptop covers and brackets often mix two or three lengths of the same thread, so lay the screws out in the order they came out (a magnetic mat or a sheet of paper with the hole pattern drawn on it works).
- Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M2.5 / M3 / M5, 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 shoulder screw screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The records span 3–10 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M2 heads take PH0 for Phillips and T6 for Torx, and a 1.5 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- 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 / M5
- 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.
- GoPro also uses M5 for its classic two-prong mount thumbscrew and buckle system, while smaller GoPro chassis screws are commonly Torx-driven without a confirmed metric thread in available sources — don't conflate the mount thumbscrew size with internal chassis screws.
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 Pavilion 4100, closest length match first.
- Dell Inspiron 9400 also M2 × 3 mm
- HP nc6230 also M2 × 3 mm
- HP Compaq tc1100 also M2 × 3 mm
- Dell Vostro 16 5620 also M2 × 3 mm
- Lenovo N22-20 Chromebook also M2 × 3 mm
- HP 15-eh2000 (ids 2100372085 also M2 × 3 mm
- HP Compaq 6530b also M2 × 3 mm
- Acer TravelMate 5720 also M2 × 3 mm
Questions about HP Pavilion 4100 screws
- What size screw does HP Pavilion 4100 use?
- M2 × 3 mm for display bezel (qty 1); M2 × 3 mm for unspecified (qty 2, flat); M2 × 4 mm for system board (qty 2); M2 × 5 mm for heat sink (qty 4); M2 × 5 mm for system board (qty 2); M2.5 × 4 mm for hard drive (qty 2); M2.5 × 4 mm for heat sink (qty 3); M2.5 × 4 mm for keyboard (qty 4); M2.5 × 4 mm for palm rest (qty 4); M2.5 × 4 mm for system board (qty 4); M2.5 × 4 mm for unspecified (qty 2); M2.5 × 4 mm for wireless card; M2.5 × 6 mm for display (qty 6); M2.5 × 6 mm for display bezel (qty 4); M2.5 × 6 mm for hard drive; M2.5 × 6 mm for optical drive (qty 3); M2.5 × 6 mm for palm rest (qty 16); M2.5 × 6 mm for speaker (qty 1); M2.5 × 6 mm for system board (qty 3); M2.5 × 6 mm for unspecifi.
- How long are the screws in HP Pavilion 4100?
- The records range from 3 to 10 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 Pavilion 4100?
- The sources do not name the drive. For M2, Phillips heads normally take PH0 and Torx heads T6; socket heads take 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 Pavilion 4100?
- TechSpareWarehouse (our own store) lists M2 x 3mm, M2 x 4mm and M2 x 5mm, which match lengths in the records above.