Lenovo ThinkPad T450 laptop screw size
M2 · 2 to 4 mm long
Lenovo ThinkPad T450 laptop takes M2 metric screws in lengths from 2 to 4 mm.
There are 3 separate fitment records for it, including flat-head/small-head/big-head nylon-coated variants used repeatedly across disassembly ste (M2), flat-head, nylon-coated screw (M2) and big-head, nylon-coated screw, quantity 4 (M2).
Head and drive, as the sources state them: flat / countersunk head.
3 of the 3 records are marked confirmed, drawn from 1 source (download.lenovo.com).
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.
Lenovo ThinkPad T450 laptop 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 | 3 mm | 0.4 mm | Flat / countersunk | not stated | Flat-head/small-head/big-head nylon-coated variants used repeatedly across disassembly stepsthread-locking patch | Confirmed |
| M2 | 2 mm | 0.4 mm | Flat / countersunk | not stated | Flat-head, nylon-coated screwthread-locking patch | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Big-head, nylon-coated screw, quantity 4thread-locking patch | Confirmed |
Fitment records and sources
Flat-head/small-head/big-head nylon-coated variants used repeatedly across disassembly steps
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Flat-head, nylon-coated screw
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Big-head, nylon-coated screw, quantity 4
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
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 screw measures about 2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- 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: the source describes a countersunk (flat) head, and those are measured overall, from the top of the head to the tip.
- The records span 2–4 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
- Packaging/labeling equipment manuals (e.g., cab print-and-apply applicators) mix M2 through M6 fasteners across a single machine for very different assemblies (sensors vs. frame vs. drive) — do not generalize one thread size to 'the machine' as a whole; cite the specific subassembly.
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
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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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Lenovo ThinkPad T450 laptop, closest length match first.
- Lenovo ThinkPad T480s also M2 × 2 mm
- Acer Nitro / Predator Wi-Fi card also M2 × 3 mm
- Lenovo ideapad 320-15IKB Touch also M2 × 3 mm
- Dell Vostro 15 5510 also M2 × 3 mm
- Lenovo S40 also M2 × 3 mm
- Dell Inspiron 14 5418 also M2 × 3 mm
- Dell Inspiron 14 5402 also M2 × 3 mm
- Lenovo ThinkPad L560 also M2 × 3 mm
Questions about Lenovo ThinkPad T450 laptop screws
- What size screw does Lenovo ThinkPad T450 laptop use?
- M2 × 3 mm for flat-head/small-head/big-head nylon-coated variants used repeatedly across disassembly steps; M2 × 2 mm for flat-head, nylon-coated screw; M2 × 4 mm for big-head, nylon-coated screw, quantity 4.
- How long are the screws in Lenovo ThinkPad T450 laptop?
- The records range from 2 to 4 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 Lenovo ThinkPad T450 laptop?
- 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 Lenovo ThinkPad T450 laptop?
- TechSpareWarehouse (our own store) lists M2 x 3mm, M2 x 2mm and M2 x 4mm, which match lengths in the records above.