Toshiba Libretto U100 screw size
M2 · 2.7 to 14 mm long
If you are replacing a screw on Toshiba Libretto U100, the thread is M2 in lengths from 2.7 to 14 mm.
There are 3 separate fitment records for it, including palm rest (qty 9, binding) (M2), optical drive (qty 2, flat) (M2) and unspecified (qty 2, flat,binding) (M2).
Head and drive, as the sources state them: binding head.
3 of the 3 records are marked confirmed, drawn from 1 source (xdevs.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.
Toshiba Libretto U100 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 | Binding head | not stated | Palm rest (qty 9, binding) | Confirmed |
| M2 | 2.7 mm | 0.4 mm | not stated | not stated | Optical drive (qty 2, flat) | Confirmed |
| M2 | 4 mm | 0.4 mm | Binding head | not stated | Unspecified (qty 2, flat,binding) | Confirmed |
Fitment records and sources
Palm rest (qty 9, binding)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Optical drive (qty 2, flat)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 2, flat,binding)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
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). 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: 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
- 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.
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
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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
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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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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Toshiba Libretto U100, closest length match first.
- HP ProBook 4540s also M2 × 4 mm
- Lenovo ThinkPad X120e also M2 × 4 mm
- HP 255R 15.6 inch G10 also M2 × 4 mm
- HP OMEN 16.1 in. gaming laptop (16-ae0xxx) also M2 × 2.7 mm
- Lenovo ThinkPad P16 Gen 2 also M2 × 2.7 mm
- HP 17-ck1000 also M2 × 4 mm
- HP ProBook x360 11 G7 EE also M2 × 4 mm
- Lenovo ThinkPad X13 Yoga Gen 1 also M2 × 4 mm
Questions about Toshiba Libretto U100 screws
- What size screw does Toshiba Libretto U100 use?
- M2 × 14 mm for palm rest (qty 9, binding); M2 × 2.7 mm for optical drive (qty 2, flat); M2 × 4 mm for unspecified (qty 2, flat,binding).
- How long are the screws in Toshiba Libretto U100?
- 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 Toshiba Libretto U100?
- 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 Toshiba Libretto U100?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm and M2 x 4mm, which match lengths in the records above.