HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2 screw size
M2.5 · 3 to 5 mm long
HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2 takes M2.5 metric screws in lengths from 3 to 5 mm.
Where it is used: base enclosure and keyboard retention screws.
This entry is marked reported and comes from h10032.www1.hp.com.
An M2.5 screw is 2.5 mm in diameter with a 0.45 mm pitch, tapped with a 2.05 mm drill; 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.
HP EliteBook 840 G2 / 740 G2 / ZBook 14 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 |
|---|---|---|---|---|---|---|
| M2.5 | 3–5 mm | 0.45 mm | not stated | not stated | base enclosure and keyboard retention screws | Reported |
Fitment records and sources
base enclosure and keyboard retention screws
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
- 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 records span 3–5 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 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 M2.5 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 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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M2.5 x 3mm Phillips Wafer Head Screws, Low Profile – 10-Pack Black
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Devices whose records share a thread with HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2, closest length match first.
- PW-Sat2 CubeSat secondary structure and panels also M2.5 × 4–5 mm
- HP Pavilion also M2.5 × 4–5 mm
- Keystone Electronics metric nylon standoff also M2.5 × 4–5 mm
- HP EliteBook 725 G3 also M2.5 × 4–5 mm
- Lenovo IdeaPad also M2.5 × 4–5 mm
- Wurth Elektronik WA-SPAIE plastic spacer stud also M2.5 × 5 mm
- Generic miniature enclosure screw (ISO 7045 pattern) applicable to compact digital scale/instrument battery doors also M2.5 × 3 mm
- Clear-Com panel PSU module also M2.5 × 5 mm
Questions about HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2 screws
- What size screw does HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2 use?
- M2.5 × 3–5 mm for base enclosure and keyboard retention screws.
- How long are the screws in HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2?
- The records range from 3 to 5 mm depending on the position, so match each screw to its own hole.
- 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 840 G2 / 740 G2 / ZBook 14 G2?
- The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take 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.
- Where can I buy replacement screws for HP EliteBook 840 G2 / 740 G2 / ZBook 14 G2?
- TechSpareWarehouse (our own store) lists M2.5 x 3mm, M2.5 x 4mm and M2.5 x 5mm, which match lengths in the records above.