HP EliteBook hard drive caddy screw size
M2.5 · 3 mm long
Our records put HP EliteBook hard drive caddy on M2.5 screws, 3 mm long.
It is listed for holds a 2.5in drive into its removable caddy.
This entry is marked reported and comes from support.hp.com.
M2.5 means a 2.5 mm nominal diameter with a 0.45 mm thread pitch. 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 hard drive caddy 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 mm | 0.45 mm | not stated | not stated | holds a 2.5in drive into its removable caddy | Reported |
Fitment records and sources
holds a 2.5in drive into its removable caddy
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- A screw that is even 1 mm too long in a laptop base can push into the keyboard, battery or a board trace, so match the length position by position.
- 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 3 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- 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
- 2.5-inch drive caddy screws are M3x3 or M3x4, NOT M2.5, even though the drive is called '2.5 inch'.
- 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.
More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with HP EliteBook hard drive caddy, closest length match first.
- Lenovo M50-80 also M2.5 × 3 mm
- Lenovo IdeaPad U410 Touch also M2.5 × 3 mm
- HP ProBook 455 G3 also M2.5 × 3 mm
- Dell Inspiron 8500 also M2.5 × 3 mm
- HP ProBook 470 G0 also M2.5 × 3 mm
- HP ProBook 455 G2 also M2.5 × 3 mm
- Toshiba Satellite 1900 also M2.5 × 3 mm
- HP ProBook 470 G2 also M2.5 × 3 mm
Questions about HP EliteBook hard drive caddy screws
- What size screw does HP EliteBook hard drive caddy use?
- M2.5 × 3 mm for holds a 2.5in drive into its removable caddy.
- How long are the screws in HP EliteBook hard drive caddy?
- The record gives 3 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 hard drive caddy?
- 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 hard drive caddy?
- TechSpareWarehouse (our own store) lists M2.5 x 3mm, which matches the length in the records above.