HP EliteBook 8570w screw size
M2.5 · 4.5 mm long
If you are replacing a screw on HP EliteBook 8570w, the thread is M2.5, 4.5 mm long.
There are 2 separate fitment records for it, including display (qty 2, Torx T8) (M2.5) and hinge (qty 4, Torx T8) (M2.5).
Head and drive, as the sources state them: Torx T8 drive.
2 of the 2 records are marked confirmed, drawn from 1 source (h10032.www1.hp.com).
For reference, M2.5 is 2.5 mm across the threads at 0.45 mm pitch. The imperial size people confuse it with: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.
HP EliteBook 8570w 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 |
|---|---|---|---|---|---|---|
| M2.5 | 4.5 mm | 0.45 mm | not stated | Torx T8 | Display (qty 2, Torx T8) | Confirmed |
| M2.5 | 4.5 mm | 0.45 mm | not stated | Torx T8 | Hinge (qty 4, Torx T8) | Confirmed |
Fitment records and sources
Display (qty 2, Torx T8)
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
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 M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.45 mm from one thread crest to the next (22.22 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 record states 4.5 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source names a Torx T8 drive. For comparison, standard M2.5 heads take PH1 (Phillips) or T8 (Torx), or a 2 mm hex key.
- Tightening: no device-specific torque is published in these records. The site's general figure for M2.5 is about 45-70 N·cm into metal threads and 20-35 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M2.5
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
- M2.5 pitch is 0.45mm vs M3's 0.5mm and M2's 0.4mm — forcing the wrong one strips plastic bosses instantly.
More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with HP EliteBook 8570w, closest length match first.
- HP ProBook 6565b also M2.5 × 4.5 mm
- Lenovo V330-14IKB also M2.5 × 4.5 mm
- HP Pavilion x360 14 inch 2-in-1 also M2.5 × 4.5 mm
- HP ProBook 6560b also M2.5 × 4.5 mm
- Lenovo ThinkPad E335 also M2.5 × 4.5 mm
- HP EliteBook 8460w also M2.5 × 4.5 mm
- HP EliteBook 8460p also M2.5 × 4.5 mm
- HP Pavilion / Omen hinges also M2.5 × 4.5 mm
Questions about HP EliteBook 8570w screws
- What size screw does HP EliteBook 8570w use?
- M2.5 × 4.5 mm for display (qty 2, Torx T8); M2.5 × 4.5 mm for hinge (qty 4, Torx T8).
- How long are the screws in HP EliteBook 8570w?
- The record gives 4.5 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M2.5 screw?
- 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
- What screwdriver do I need for HP EliteBook 8570w?
- The source lists a Torx T8 drive. Standard M2.5 heads otherwise take PH1 (Phillips) or T8 (Torx), or a 2 mm hex key.
- Can I use an imperial screw instead of M2.5?
- No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.