HP EliteBook 840 G5 / 846 G5 screw size
M2 / M2.5 · 2 to 11 mm long
The screws used on HP EliteBook 840 G5 / 846 G5 are M2 and M2.5 in lengths from 2 to 11 mm.
There are 7 separate fitment records for it, including M.2 SSD retention screw (1), WLAN module (2), WWAN module (2) (M2), keyboard retention (2), board-to-computer (2), power button board (1), fingerprint bracket (M2) and speaker retention (2), touchpad retention (5), smart card reader (3) (M2), plus 4 more in the table below.
7 of the 7 records are marked confirmed, drawn from 1 source (hp.it-shop.bg).
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 EliteBook 840 G5 / 846 G5 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 | 2 mm | 0.4 mm | not stated | not stated | M.2 SSD retention screw (1), WLAN module (2), WWAN module (2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Keyboard retention (2), board-to-computer (2), power button board (1), fingerprint bracket (1), board retention (4), fan retention (5) | Confirmed |
| M2 | 2.5 mm | 0.4 mm | not stated | not stated | Speaker retention (2), touchpad retention (5), smart card reader (3) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Display panel to enclosure (4) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Bracket/assembly retention (6), right display hinge (2), display hinges (5) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | not stated | System board retention (3 + 4) | Confirmed |
| M2.5 | 11 mm | 0.45 mm | not stated | not stated | Display hinge replacement screws (3) - long variant | Confirmed |
Fitment records and sources
M.2 SSD retention screw (1), WLAN module (2), WWAN module (2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard retention (2), board-to-computer (2), power button board (1), fingerprint bracket (1), board retention (4), fan retention (5)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Speaker retention (2), touchpad retention (5), smart card reader (3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display panel to enclosure (4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Bracket/assembly retention (6), right display hinge (2), display hinges (5)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board retention (3 + 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display hinge replacement screws (3) - long variant
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 screw measures about 2 mm with calipers (usually a hair under). This device also uses M2.5, 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 2–11 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
- M.2 SSD mounting screws (M2 x 3mm) are frequently mislabeled generically as 'M.2 screws' which can be confused with the M2 metric thread designation — they do coincide numerically here but are conceptually distinct (M.2 = card format, M2 = thread size).
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- 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.
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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10x M2 x 2mm Phillips Screws for HP EliteBook 840 G6 846 G6 SSD WiFi
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M2 x 2mm Phillips Flat Head Screw for HP EliteBook 840/846 G6 Laptop Repair - Pack of 100 Black
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M2 x 3mm Screws for Dell XPS 13 9340 Base Cover SSD Shield 10-Pack Black
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10x M2 x 3mm Phillips Screws for Lenovo ThinkPad X131e Chromebook WiFi SSD
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M2 x 2.5mm Screws for Dell XPS 14 9440 M.2 SSD Drive – 10-Pack Black
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M2 x 2.5mm Screws for ASUS ROG Strix G17 G713 SSD WiFi Touchpad 10-Pack Black
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ASUS ROG Strix G15 G513R Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
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ASUS ROG Strix G17 G713 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with HP EliteBook 840 G5 / 846 G5, closest length match first.
- Lenovo ThinkPad X20 also M2 × 3 mm
- Lenovo IdeaPad Y510p also M2 × 2 mm
- Dell XPS 13 9310 2-in-1 also M2.5 × 3 mm
- Lenovo ThinkPad A275 also M2 × 2 mm
- Acer Aspire 4310 also M2 × 3 mm
- HP ZBook Firefly 14 inch G11 A also M2 × 2 mm
- ASUS ZenBook M.2 SSD also M2 × 3 mm
- HP ProBook 4 G2iR 14 inch also M2 × 2 mm
Questions about HP EliteBook 840 G5 / 846 G5 screws
- What size screw does HP EliteBook 840 G5 / 846 G5 use?
- M2 × 2 mm for M.2 SSD retention screw (1), WLAN module (2), WWAN module (2); M2 × 3 mm for keyboard retention (2), board-to-computer (2), power button board (1), fingerprint bracket (1), board retention (4), fan retention (5); M2 × 2.5 mm for speaker retention (2), touchpad retention (5), smart card reader (3); M2 × 2 mm for display panel to enclosure (4); M2.5 × 5 mm for bracket/assembly retention (6), right display hinge (2), display hinges (5); M2.5 × 3 mm for system board retention (3 + 4); M2.5 × 11 mm for display hinge replacement screws (3) - long variant.
- How long are the screws in HP EliteBook 840 G5 / 846 G5?
- The records range from 2 to 11 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 G5 / 846 G5?
- 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 EliteBook 840 G5 / 846 G5?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 2.5mm, which match lengths in the records above.