Acer Emachines E628 screw size
M2 / M2.5 / M3 · 3 to 8 mm long
The screws used on Acer Emachines E628 are M2, M2.5 and M3 in lengths from 3 to 8 mm.
There are 22 separate fitment records for it, including display (qty 4) (M2), optical drive (qty 2) (M2) and touchpad (qty 1) (M2), plus 19 more in the table below.
22 of the 22 records are marked confirmed, drawn from 1 source (tim.id.au).
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.
Acer Emachines E628 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 | Display (qty 4) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Optical drive (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Touchpad (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Unspecified (qty 10, silver) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | not stated | Hard drive (qty 2) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | not stated | Optical drive (qty 1) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | not stated | Speaker (qty 4) | Confirmed |
| M2.5 | 3 mm | 0.45 mm | not stated | not stated | Unspecified (qty 1) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Display bezel (qty 4) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Hard drive (qty 2) | Confirmed |
| M2.5 | 4 mm | 0.45 mm | not stated | not stated | Unspecified (qty 4, silver) | Confirmed |
| M2.5 | 5 mm | 0.45 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | I/O board (qty 1) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Display (qty 3) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Fan (qty 1) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Heat sink (qty 4) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | System board (qty 2) | Confirmed |
| M2.5 | 6 mm | 0.45 mm | not stated | not stated | Unspecified (qty 7) | Confirmed |
| M2.5 | 8 mm | 0.45 mm | not stated | not stated | Unspecified (qty 18) | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | not stated | Hard drive (qty 4) | Confirmed |
| M3 | 3 mm | 0.5 mm | not stated | not stated | Unspecified (qty 4) | Confirmed |
Fitment records and sources
Display (qty 4)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Optical drive (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Touchpad (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Unspecified (qty 10, silver)
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
Hard drive (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Optical drive (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Speaker (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display bezel (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 4, silver)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
I/O board (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Display (qty 3)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Fan (qty 1)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Heat sink (qty 4)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
System board (qty 2)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 7)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Unspecified (qty 18)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
Hard drive (qty 4)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
Unspecified (qty 4)
pitch 0.5 mm · tap 2.5 mm · clearance 3.4 mm · PH1 / Torx T10
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 / M3, 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 3–8 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 / M3
- 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).
- M2.5 and M3 look the same to the naked eye — you need calipers on the shank to tell them apart.
- 3.5in desktop and enterprise hard drives are 6-32 UNC imperial, not M3 - only the 2.5in form factor is metric.
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 Acer Emachines E628, closest length match first.
- Lenovo ThinkPad P16v Gen 2 also M2 × 3 mm
- Lenovo ThinkPad T14s Gen 4 also M2.5 × 5 mm
- HP ProBook 5310m also M2.5 × 4 mm
- Lenovo ideapad 330-15IKB D also M2 × 3 mm
- HP EliteBook 8740w also M2 × 3 mm
- Lenovo ThinkPad X1 Yoga 2nd Gen also M2 × 3 mm
- HP 4410T also M2 × 3 mm
- Lenovo ThinkPad T14s Gen 5 also M2 × 3 mm
Questions about Acer Emachines E628 screws
- What size screw does Acer Emachines E628 use?
- M2 × 3 mm for display (qty 4); M2 × 3 mm for optical drive (qty 2); M2 × 3 mm for touchpad (qty 1); M2 × 3 mm for unspecified (qty 10, silver); M2 × 3 mm for wireless card (qty 1); M2.5 × 3 mm for hard drive (qty 2); M2.5 × 3 mm for optical drive (qty 1); M2.5 × 3 mm for speaker (qty 4); M2.5 × 3 mm for unspecified (qty 1); M2.5 × 4 mm for display bezel (qty 4); M2.5 × 4 mm for hard drive (qty 2); M2.5 × 4 mm for unspecified (qty 4, silver); M2.5 × 5 mm for system board (qty 2); M2.5 × 6 mm for I/O board (qty 1); M2.5 × 6 mm for display (qty 3); M2.5 × 6 mm for fan (qty 1); M2.5 × 6 mm for heat sink (qty 4); M2.5 × 6 mm for system board (qty 2); M2.5 × 6 mm for unspecified (qty 7); M2.5 × 8 .
- How long are the screws in Acer Emachines E628?
- The records range from 3 to 8 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 Acer Emachines E628?
- 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 Acer Emachines E628?
- TechSpareWarehouse (our own store) lists M2 x 3mm, M2.5 x 3mm and M2.5 x 4mm, which match lengths in the records above.