Lenovo 100w screw size
M2 / M2.5 · 2.5 to 5 mm long
Lenovo 100w takes M2 and M2.5 metric screws in lengths from 2.5 to 5 mm.
There are 12 separate fitment records for it, including display (qty 6, flat, black) (M2), display (qty 10, flat, black) (M2) and heat sink (qty 3, flat, black) (M2), plus 9 more in the table below.
12 of the 12 records are marked confirmed, drawn from 1 source (download.lenovo.com).
For reference, M2 is 2 mm across the threads at 0.4 mm pitch. The imperial size people confuse it with: #2-56 UNC (2.18 mm) is close but not interchangeable.
Lenovo 100w 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 | 2.5 mm | 0.4 mm | not stated | not stated | Display (qty 6, flat, black)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Display (qty 10, flat, black)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Heat sink (qty 3, flat, black)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified (qty 2, flat, black)black finish | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | I/O board (qty 2, flat, silver) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Battery (qty 4, flat, silver) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | System board (qty 6, flat, silver) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Unspecified (qty 2, flat, silver) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | USB-C board (qty 3, flat, silver) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1, flat, silver) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | SSD (qty 1, flat, silver) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | Keyboard (qty 6, broadhead, black)black finish | Confirmed |
Fitment records and sources
Display (qty 6, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 10, flat, black)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Heat sink (qty 3, 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
I/O board (qty 2, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 4, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 6, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
USB-C board (qty 3, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 1, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 1, flat, silver)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Keyboard (qty 6, broadhead, black)
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 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 2.5–5 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.
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
- 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.
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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 4mm Phillips Wafer Head Machine Screws Black 50-Pack Laptop SSD Repair
$4.49 each · min. 2
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M2 x 4mm Screws for Dell Latitude 5530 SSD Type-C Bracket 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
$0.10Choose size -
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
$0.10Choose size
More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Lenovo 100w, closest length match first.
- Dell Inspiron 1720 also M2 × 3 mm
- Dell Vostro 13 5300 also M2 × 2.5 mm
- HP ENVY x360 13 also M2 × 3 mm
- Dell Inspiron 13 5378 also M2 × 2.5 mm
- HP ProBook 430 G2 also M2 × 3 mm
- Lenovo E41-10 also M2 × 3 mm
- Lenovo ThinkPad L13 also M2 × 2.5 mm
- Lenovo IdeaPad S510p also M2 × 2.5 mm
Questions about Lenovo 100w screws
- What size screw does Lenovo 100w use?
- M2 × 2.5 mm for display (qty 6, flat, black); M2 × 3 mm for display (qty 10, flat, black); M2 × 3 mm for heat sink (qty 3, flat, black); M2 × 3 mm for unspecified (qty 2, flat, black); M2 × 3.5 mm for I/O board (qty 2, flat, silver); M2 × 3.5 mm for battery (qty 4, flat, silver); M2 × 3.5 mm for system board (qty 6, flat, silver); M2 × 3.5 mm for unspecified (qty 2, flat, silver); M2 × 3.5 mm for USB-C board (qty 3, flat, silver); M2 × 3.5 mm for wireless card (qty 1, flat, silver); M2 × 4 mm for SSD (qty 1, flat, silver); M2.5 × 5 mm for keyboard (qty 6, broadhead, black).
- How long are the screws in Lenovo 100w?
- The records range from 2.5 to 5 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 100w?
- 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 100w?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm, M2 x 3mm and M2 x 4mm, which match lengths in the records above.