Lenovo ThinkPad E41-55 screw size
M2 / M2.5 · 2 to 5.5 mm long
If you are replacing a screw on Lenovo ThinkPad E41-55, the thread is M2 and M2.5 in lengths from 2 to 5.5 mm.
There are 12 separate fitment records for it, including memory (qty 1) (M2), power button (qty 1) (M2) and battery (qty 1) (M2), plus 9 more in the table below.
12 of the 12 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 E41-55 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 mm | 0.4 mm | not stated | not stated | Memory (qty 1) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Power button (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Battery (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Fan (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Hard drive (qty 3) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Heat sink (qty 3) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Memory (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | System board (qty 3) | Confirmed |
| M2 | 5 mm | 0.4 mm | not stated | not stated | Base cover (qty 10) | Confirmed |
| M2.5 | 2.5 mm | 0.45 mm | not stated | not stated | Hinge (qty 8) | Confirmed |
| M2.5 | 5.5 mm | 0.45 mm | not stated | not stated | DC-in (qty 3) | Confirmed |
| M2.5 | 5.5 mm | 0.45 mm | not stated | not stated | Display (qty 6) | Confirmed |
Fitment records and sources
Memory (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Power button (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hard drive (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Heat sink (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Memory (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 10)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hinge (qty 8)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
DC-in (qty 3)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 6)
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: 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
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- M2 (2.00mm, 0.4mm pitch) is NOT the same as #2-56 UNC (2.18mm) — close enough to cross-thread and strip if forced.
- 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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10x M2 x 2mm Phillips Screws for HP EliteBook 840 G6 846 G6 SSD WiFi
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M2 x 2mm Phillips Flat Head Screw for HP EliteBook 840/846 G6 Laptop Repair - Pack of 100 Black
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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
$4.99
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M2 x 5mm Replacement Bottom Case Screws for Dell Inspiron 3535 Laptop 10-Pack
$4.99 -
M2 x 5mm Phillips Wafer Head Screw for Dell G16 7630 Gaming Laptop Repair - Pack of 100 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 ThinkPad E41-55, closest length match first.
- Dell G5 15 5505 also M2 × 2 mm
- Lenovo 1500 also M2 × 5 mm
- Lenovo ThinkPad SL300 also M2 × 2 mm
- Lenovo E50-70 also M2 × 2 mm
- Lenovo V15 Gen 2 also M2 × 2 mm
- Lenovo B50-30 Touch also M2 × 2 mm
- HP 4000 are separate HP products not checked) also M2 × 3 mm
- Dell Inspiron 14 3490 also M2 × 2 mm
Questions about Lenovo ThinkPad E41-55 screws
- What size screw does Lenovo ThinkPad E41-55 use?
- M2 × 2 mm for memory (qty 1); M2 × 2 mm for power button (qty 1); M2 × 3 mm for battery (qty 1); M2 × 3 mm for fan (qty 2); M2 × 3 mm for hard drive (qty 3); M2 × 3 mm for heat sink (qty 3); M2 × 3 mm for memory (qty 1); M2 × 3 mm for system board (qty 3); M2 × 5 mm for base cover (qty 10); M2.5 × 2.5 mm for hinge (qty 8); M2.5 × 5.5 mm for DC-in (qty 3); M2.5 × 5.5 mm for display (qty 6).
- How long are the screws in Lenovo ThinkPad E41-55?
- The records range from 2 to 5.5 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 ThinkPad E41-55?
- 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 E41-55?
- TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 3mm and M2 x 5mm, which match lengths in the records above.