Lenovo ThinkPad 15.4WS screw size
M2 / M2.5 · 2.7 to 14 mm long
If you are replacing a screw on Lenovo ThinkPad 15.4WS, the thread is M2 and M2.5 in lengths from 2.7 to 14 mm.
There are 40 separate fitment records for it, including base cover (qty 2, flat, black) (M2), coin-cell battery (qty 2, flat, black) (M2) and keyboard (qty 1, flat, black) (M2), plus 37 more in the table below.
Head and drive, as the sources state them: binding head.
40 of the 40 records are marked confirmed, drawn from 1 source (tim.id.au).
An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
Lenovo ThinkPad 15.4WS 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 | 14 mm | 0.4 mm | not stated | not stated | Base cover (qty 2, flat, black)black finish | Confirmed |
| M2 | 14 mm | 0.4 mm | not stated | not stated | Coin-cell battery (qty 2, flat, black)black finish | Confirmed |
| M2 | 14 mm | 0.4 mm | not stated | not stated | Keyboard (qty 1, flat, black)black finish | Confirmed |
| M2 | 14 mm | 0.4 mm | not stated | not stated | Memory (qty 1, flat, black)black finish | Confirmed |
| M2 | 14 mm | 0.4 mm | not stated | not stated | Palm rest (qty 4, flat, black)black finish | Confirmed |
| M2 | 14 mm | 0.4 mm | not stated | not stated | Unspecified (qty 4, flat, black)black finish | Confirmed |
| M2 | 2.7 mm | 0.4 mm | not stated | not stated | System board (qty 2, flat, black)black finish | Confirmed |
| M2 | 2.8 mm | 0.4 mm | not stated | not stated | Display (qty 4, flat, silver) | Confirmed |
| M2 | 2.8 mm | 0.4 mm | not stated | not stated | Wireless card (qty 6, flat, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Base cover (qty 1, small-head, silver,black)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Chassis/frame (qty 1, flat,small-head, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Coin-cell battery (qty 2, small-head, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Display (qty 4, flat, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Fan (qty 1, small-head, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Memory (qty 2, small-head, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Speaker (qty 3, small-head, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified (qty 3, small-head,flat, silver,black)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 2, small-head, silver) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | I/O board (qty 2, flat, black)black finish | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Base cover (qty 2, flat, black)black finish | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Chassis/frame (qty 9, flat, black)black finish | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Coin-cell battery (qty 2, flat, black)black finish | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Display (qty 4, flat, black)black finish | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Unspecified (qty 2, flat, black,silver)black finish | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Display (qty 2, flat, black)black finish | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | System board (qty 5, flat, black)black finish | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Unspecified (qty 1, flat, black)black finish | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Base cover (qty 9, flat, black)black finish | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Chassis/frame (qty 1, flat, black)black finish | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Unspecified (qty 2, flat, black)black finish | Confirmed |
| M2 | 9.5 mm | 0.4 mm | not stated | not stated | Base cover (qty 1, flat, black)black finish | Confirmed |
| M2 | 9.5 mm | 0.4 mm | not stated | not stated | Chassis/frame (qty 1, flat, black)black finish | Confirmed |
| M2 | 9.5 mm | 0.4 mm | not stated | not stated | Fan (qty 3, flat, black)black finish | Confirmed |
| M2 | 9.5 mm | 0.4 mm | not stated | not stated | Memory (qty 2, flat, black)black finish | Confirmed |
| M2 | 9.5 mm | 0.4 mm | not stated | not stated | Unspecified (qty 3, flat, black,silver)black finish | Confirmed |
| M2 | 9.5 mm | 0.4 mm | not stated | not stated | Wireless card (qty 2, flat, black)black finish | Confirmed |
| M2.5 | 4 mm | 0.45 mm | Binding head | not stated | Display (qty 3, binding, black)black finish | Confirmed |
| M2.5 | 4 mm | 0.45 mm | Binding head | not stated | System board (qty 2, binding, black)black finish | Confirmed |
| M2.5 | 7 mm | 0.45 mm | Binding head | not stated | Display (qty 1, binding, black)black finish | Confirmed |
| M2.5 | 7 mm | 0.45 mm | Binding head | not stated | System board (qty 3, binding, black)black finish | Confirmed |
Fitment records and sources
Base cover (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Coin-cell battery (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard (qty 1, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Memory (qty 1, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Palm rest (qty 4, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 4, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 6, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 1, small-head, silver,black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Chassis/frame (qty 1, flat,small-head, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Coin-cell battery (qty 2, small-head, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (qty 1, small-head, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Memory (qty 2, small-head, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Speaker (qty 3, small-head, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 3, small-head,flat, silver,black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 2, small-head, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O board (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Chassis/frame (qty 9, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Coin-cell battery (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, flat, black,silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 5, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 1, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 9, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Chassis/frame (qty 1, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 1, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Chassis/frame (qty 1, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (qty 3, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Memory (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 3, flat, black,silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 2, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 3, binding, black)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 2, binding, black)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 1, binding, black)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 3, binding, black)
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: for binding head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The records span 2.7–14 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).
- Xbox Series X internal chassis screws are M3, not M2 (confirmed on iFixit) — a widespread misconception.
- Nylon-coated M2.5 screws (ThinkPad Edge) are thread-locking; plain replacements work loose over time.
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
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 15.4WS, closest length match first.
- HP Fortis x360 11 inch G3 J Chromebook™ also M2 × 4 mm
- Acer TravelMate 4330G also M2 × 3 mm
- HP 14-kc0000 (ids 2103369433 also M2 × 3 mm
- Lenovo V17 Gen 4 i also M2 × 2.8 mm
- HP EliteBook 830 G10 also M2 × 4 mm
- Acer Aspire 5332 / 5732Z also M2 × 3 mm
- Lenovo B50-30 also M2 × 3 mm
- HP mt20 Mobile Thin Client also M2 × 3 mm
Questions about Lenovo ThinkPad 15.4WS screws
- What size screw does Lenovo ThinkPad 15.4WS use?
- M2 × 14 mm for base cover (qty 2, flat, black); M2 × 14 mm for coin-cell battery (qty 2, flat, black); M2 × 14 mm for keyboard (qty 1, flat, black); M2 × 14 mm for memory (qty 1, flat, black); M2 × 14 mm for palm rest (qty 4, flat, black); M2 × 14 mm for unspecified (qty 4, flat, black); M2 × 2.7 mm for system board (qty 2, flat, black); M2 × 2.8 mm for display (qty 4, flat, silver); M2 × 2.8 mm for wireless card (qty 6, flat, silver); M2 × 3 mm for base cover (qty 1, small-head, silver,black); M2 × 3 mm for chassis/frame (qty 1, flat,small-head, silver); M2 × 3 mm for coin-cell battery (qty 2, small-head, silver); M2 × 3 mm for display (qty 4, flat, silver); M2 × 3 mm for fan (qty 1, small-.
- How long are the screws in Lenovo ThinkPad 15.4WS?
- The records range from 2.7 to 14 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 15.4WS?
- 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 15.4WS?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm, M2 x 3mm and M2 x 4mm, which match lengths in the records above.