Lenovo IdeaPad 3-15IAN8 lower cover screw screw size
M2 · 4 mm long
Our records put Lenovo IdeaPad 3-15IAN8 lower cover screw on M2 screws, 4 mm long.
It is listed for guide states four M2 x L4 screws in lower case.
This entry is marked confirmed and comes from ifixit.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 IdeaPad 3-15IAN8 lower cover screw 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 | 4 mm | 0.4 mm | not stated | not stated | Guide states four M2 x L4 screws in lower case | Confirmed |
Fitment records and sources
Guide states four M2 x L4 screws in lower case
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: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The record states 4 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- 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
- The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
- 'M2' is sometimes used loosely by resellers to mean 'roughly 2mm' without a real ISO metric thread; only counted here when the source datasheet explicitly states 'M2' thread.
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 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
$4.99
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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
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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
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Dell Latitude 5530 Replacement Screws Sold Individually – M2 x 3mm, M2 x 4mm, M2.5 x 5mm Phillips Wafer Head, Black
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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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Devices whose records share a thread with Lenovo IdeaPad 3-15IAN8 lower cover screw, closest length match first.
- HP Compaq Presario V4000 also M2 × 4 mm
- HP ProBook 470 G3 also M2 × 4 mm
- HP EliteBook 8730w also M2 × 4 mm
- HP Omen fans and heatsink also M2 × 4 mm
- Lenovo YOGA C630-13Q50 also M2 × 4 mm
- Dell G7 17 7700 also M2 × 4 mm
- HP 255 G9 also M2 × 4 mm
- HP ProBook 455 G7 also M2 × 4 mm
Questions about Lenovo IdeaPad 3-15IAN8 lower cover screw screws
- What size screw does Lenovo IdeaPad 3-15IAN8 lower cover screw use?
- M2 × 4 mm for guide states four M2 x L4 screws in lower case.
- How long are the screws in Lenovo IdeaPad 3-15IAN8 lower cover screw?
- The record gives 4 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- 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 IdeaPad 3-15IAN8 lower cover screw?
- 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 IdeaPad 3-15IAN8 lower cover screw?
- TechSpareWarehouse (our own store) lists M2 x 4mm, which matches the length in the records above.