Lenovo ideapad 100S-11IBY screw size
M2 / M2.5 · 2.5 to 4.5 mm long
Our records put Lenovo ideapad 100S-11IBY on M2 and M2.5 screws in lengths from 2.5 to 4.5 mm.
There are 8 separate fitment records for it, including display (qty 6, black, Phillips) (M2), I/O board (qty 2, black, Phillips) (M2) and battery (qty 4, black, Phillips) (M2), plus 5 more in the table below.
Head and drive, as the sources state them: Phillips drive.
8 of the 8 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 ideapad 100S-11IBY 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 | Phillips | Display (qty 6, black, Phillips)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | I/O board (qty 2, black, Phillips)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Battery (qty 4, black, Phillips)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Display (qty 4, white, Phillips) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | System board (qty 5, black, Phillips)black finish | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | Phillips | Touchpad (qty 2, black,white, Phillips)black finish | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | Phillips | Base cover (qty 11, white, Phillips) | Confirmed |
| M2.5 | 4.5 mm | 0.45 mm | not stated | Phillips | Palm rest (qty 6, black, Phillips)black finish | Confirmed |
Fitment records and sources
Display (qty 6, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
I/O board (qty 2, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery (qty 4, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display (qty 4, white, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 5, black, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Touchpad (qty 2, black,white, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 11, white, Phillips)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Palm rest (qty 6, black, Phillips)
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 2.5–4.5 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source names a Phillips drive. For comparison, standard M2 heads take PH0 (Phillips) or T6 (Torx), or a 1.5 mm hex key.
- 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.
- 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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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Lenovo ideapad 100S-11IBY, closest length match first.
- Dell Latitude 5424 also M2 × 3 mm
- HP EliteBook 6930p also M2 × 3 mm
- HP Pavilion DV6500 also M2 × 3 mm
- HP Compaq 325 also M2 × 2.5 mm
- Dell Latitude D531 also M2 × 3 mm
- Lenovo ThinkPad W510 also M2 × 3 mm
- Acer TravelMate 8331 also M2 × 3 mm
- HP OMEN 17-w0xx also M2 × 2.5 mm
Questions about Lenovo ideapad 100S-11IBY screws
- What size screw does Lenovo ideapad 100S-11IBY use?
- M2 × 2.5 mm for display (qty 6, black, Phillips); M2 × 3 mm for I/O board (qty 2, black, Phillips); M2 × 3 mm for battery (qty 4, black, Phillips); M2 × 3 mm for display (qty 4, white, Phillips); M2 × 3 mm for system board (qty 5, black, Phillips); M2 × 3 mm for touchpad (qty 2, black,white, Phillips); M2 × 3.5 mm for base cover (qty 11, white, Phillips); M2.5 × 4.5 mm for palm rest (qty 6, black, Phillips).
- How long are the screws in Lenovo ideapad 100S-11IBY?
- The records range from 2.5 to 4.5 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 ideapad 100S-11IBY?
- The source lists a Phillips drive. Standard M2 heads otherwise take PH0 (Phillips) or T6 (Torx), or 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 100S-11IBY?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm and M2 x 3mm, which match lengths in the records above.