Dell Chromebook 11 3189 2-in-1 screw size
M2 / M2.5 · 3 to 7 mm long
The screws used on Dell Chromebook 11 3189 2-in-1 are M2 and M2.5 in lengths from 3 to 7 mm.
There are 7 separate fitment records for it, including I/O board (qty 1) (M2), battery (M2) and display (M2), plus 4 more in the table below.
7 of the 7 records are marked confirmed, drawn from 1 source (dl.dell.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.
Dell Chromebook 11 3189 2-in-1 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 | 3 mm | 0.4 mm | not stated | not stated | I/O board (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Battery | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Display | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | System board (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2.5 | 7 mm | 0.45 mm | not stated | not stated | Base cover (qty 1, captive)captive | Confirmed |
Fitment records and sources
I/O board (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Battery
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Display
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 1, captive)
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 3–7 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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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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M2.5 x 7mm Black Wafer Head Base Cover Screws for Dell Inspiron 15 3580 3581 3582 3583 3584 3590 3593 – 12-Pack Replacement
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M2.5 x 7mm Black Wafer Head Base Cover Screws for Dell Inspiron 15 5578 2-in-1 & Inspiron 17 5770 – 12-Pack Replacement
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More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Dell Chromebook 11 3189 2-in-1, closest length match first.
- Lenovo V580 also M2 × 3 mm
- Dell Latitude D530 also M2 × 3 mm
- Lenovo ThinkPad W701ds also M2 × 3 mm
- Lenovo IdeaPad C340-14IML also M2 × 3 mm
- Lenovo ideapad 130-15IKB also M2.5 × 7 mm
- Dell Alienware m18 R1 also M2 × 3 mm
- HP Elite c640 14 inch G3 Chromebook™ also M2 × 3 mm
- Lenovo ThinkPad S531 also M2 × 3 mm
Questions about Dell Chromebook 11 3189 2-in-1 screws
- What size screw does Dell Chromebook 11 3189 2-in-1 use?
- M2 × 3 mm for I/O board (qty 1); M2 × 3 mm for battery; M2 × 3 mm for display; M2 × 3 mm for system board (qty 1); M2 × 3 mm for unspecified (qty 1); M2 × 3 mm for wireless card (qty 1); M2.5 × 7 mm for base cover (qty 1, captive).
- How long are the screws in Dell Chromebook 11 3189 2-in-1?
- The records range from 3 to 7 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 Dell Chromebook 11 3189 2-in-1?
- 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 Dell Chromebook 11 3189 2-in-1?
- TechSpareWarehouse (our own store) lists M2 x 3mm, which matches the length in the records above.