HP EliteBook 840 G1 screw size

HP EliteBook 840 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.

How to check the screw before you buy

1. 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).
2. 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.
3. 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.
4. Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
5. The records span 2–8 mm, which means different positions take different lengths — match each hole to its own screw.
6. 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.
7. 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.

Pitch gauge · Screw size finder · Torque guide

More in Laptops & PCs

The same screw also fits

Devices whose records share a thread with HP EliteBook 840 G1, closest length match first.

• Lenovo ideapad 330E-17IKB U also M2 × 3 mm
• Lenovo ThinkPad 365 also M2 × 5 mm
• Lenovo YOGA 330R-11IGM also M2 × 2 mm
• Dell Precision 5570 also M2 × 2 mm
• Lenovo Yoga Slim 7 15ILL9 also M2 × 2 mm
• Lenovo IdeaPad S405 also M2 × 2 mm
• HP ZBook Power 16 inch G11 A also M2 × 2 mm
• Dell Vostro 16 5640 also M2.5 × 5 mm

Questions about HP EliteBook 840 G1 screws

What size screw does HP EliteBook 840 G1 use?

M2 × 2 mm for display (qty 6, broadhead, Phillips); M2 × 3 mm for display (qty 4, Phillips); M2 × 3 mm for power button (qty 1, broadhead, Phillips); M2 × 3 mm for speaker (qty 2, Phillips); M2 × 3 mm for SSD (qty 1, Phillips); M2 × 3 mm for wireless card (qty 2, Phillips); M2 × 5 mm for I/O board (qty 2, Phillips); M2 × 5 mm for unspecified (qty 6, broadhead, Phillips); M2 × 8 mm for unspecified (qty 1, broadhead, Phillips); M2.5 × 5 mm for system board (qty 3, Phillips); M2.5 × 5 mm for unspecified (qty 21, Torx T8); M3 × 3 mm for hard drive (qty 4, Phillips).

How long are the screws in HP EliteBook 840 G1?

The records range from 2 to 8 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 EliteBook 840 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 EliteBook 840 G1?

TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 5mm, which match lengths in the records above.