Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9 screw size
M1.2 / M1.6 / M2.5 · 1.7 to 4 mm long
Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9 takes M1.2, M1.6 and M2.5 metric screws in lengths from 1.7 to 4 mm.
There are 3 separate fitment records for it, including 10x M1.2x1.7 and 4x M1.2x2.1 internal screws (M1.2), 12x M1.6x2.6 flat-head nylon-coated screws including display hinge locations (M1.6) and 8-12x M2.5x4.0 flat-head nylon-coated screws incl. display hinge to base (M2.5).
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).
An M1.2 screw is 1.2 mm in diameter with a 0.25 mm pitch, tapped with a 0.95 mm drill; imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute.
Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9 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 |
|---|---|---|---|---|---|---|
| M1.2 | 1.7–2.1 mm | 0.25 mm | not stated | not stated | 10x M1.2x1.7 and 4x M1.2x2.1 internal screws | Confirmed |
| M1.6 | 2.6 mm | 0.35 mm | Flat / countersunk | not stated | 12x M1.6x2.6 flat-head nylon-coated screws including display hinge locationsthread-locking patch | Confirmed |
| M2.5 | 4 mm | 0.45 mm | Flat / countersunk | not stated | 8-12x M2.5x4.0 flat-head nylon-coated screws incl. display hinge to basethread-locking patch | Confirmed |
Fitment records and sources
10x M1.2x1.7 and 4x M1.2x2.1 internal screws
pitch 0.25 mm · tap 0.95 mm · clearance 1.4 mm · PH000 / JIS 00 / Torx T1–T2
12x M1.6x2.6 flat-head nylon-coated screws including display hinge locations
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
8-12x M2.5x4.0 flat-head nylon-coated screws incl. display hinge to base
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 M1.2 screw measures about 1.2 mm with calipers (usually a hair under). This device also uses M1.6 / M2.5, so measure each screw rather than assuming they match.
- Pitch: 0.25 mm from one thread crest to the next (40 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 1.7–4 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M1.2 heads take PH000 / JIS 00 for Phillips and T1–T2 for Torx; 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 M1.2 is about 5-8 N·cm into metal threads and 3-5 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.2 / M1.6 / M2.5
- M1.2 and M1.4 look identical in an eyeglass repair kit — the wrong one strips soft acetate or metal hinges.
- Headphone hinge screw sizes are usually quoted from screwdriver bit size, not an actual thread spec - measure before buying.
- Nylon-coated M2.5 screws (ThinkPad Edge) are thread-locking; plain replacements work loose over time.
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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M1.2 x 2mm Phillips Wafer Head Screw for Digital Camera & Micro Robotics - Pack of 50 Black
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M2.5 x 4mm Screws for Lenovo IdeaPad 5 Pro 14 Display Hinge 10-Pack Black
$4.99 -
M2.5 x 4mm Screws for Lenovo IdeaPad 5 Pro 14 System Board Hinge 10-Pack Black
$4.99
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HP EliteBook 840 G8 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 4mm, M2.5 x 4mm Phillips Wafer Head, Black
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M2 x 2.5mm, M2 x 5mm, M2.5 x 4mm Phillips Wafer Head Screws Sold Individually – Black
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M1.2 x 2mm Replacement Propeller Screws for DJI Neo Drone 10-Pack
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M1.2 x 2mm Phillips Wafer Head Screw for Alienware x16 R2 Laptop Repair - Single Replacement Black
$0.10 each · min. 50
More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9, closest length match first.
- Lenovo ThinkPad X100e also M2.5 × 4 mm
- Lenovo ideapad 310S-14AST also M2.5 × 4 mm
- Lenovo ThinkPad T450s also M2.5 × 4 mm
- HP EliteBook 630 G10 also M2.5 × 4 mm
- Lenovo ThinkPad X13 Yoga Gen 4 also M1.6 × 2.6 mm
- HP Compaq 6830s also M2.5 × 4 mm
- HP Spectre bottom case also M2.5 × 4 mm
- HP ENVY x360 m6-w1xx also M2.5 × 4 mm
Questions about Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9 screws
- What size screw does Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9 use?
- M1.2 × 1.7–2.1 mm for 10x M1.2x1.7 and 4x M1.2x2.1 internal screws; M1.6 × 2.6 mm for 12x M1.6x2.6 flat-head nylon-coated screws including display hinge locations; M2.5 × 4 mm for 8-12x M2.5x4.0 flat-head nylon-coated screws incl. display hinge to base.
- How long are the screws in Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9?
- The records range from 1.7 to 4 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M1.2 screw?
- 0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.
- What screwdriver do I need for Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9?
- The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.
- Can I use an imperial screw instead of M1.2?
- No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Lenovo ThinkPad X1 Carbon Gen 12 / X1 2-in-1 Gen 9?
- TechSpareWarehouse (our own store) lists M1.2 x 2mm and M2.5 x 4mm, which match lengths in the records above.