Acer 5510/4020 series I/O and misc chassis screws screw size
M2 · 2.5 to 3 mm long
Acer 5510/4020 series I/O and misc chassis screws takes M2 metric screws in lengths from 2.5 to 3 mm.
Where it is used: screw list includes 'SCREW M2.0X2.5-I-NI-NYLOK' and 'SCREW I2*3M-NIHY (M2L3)', both explicit M2 metric threads used for internal boards.
This entry is marked confirmed and comes from manualsdir.com.
An M2 screw is 2 mm in diameter with a 0.4 mm pitch, tapped with a 1.6 mm drill; imperial look-alike: #2-56 UNC (2.18 mm) is close but not interchangeable.
Acer 5510/4020 series I/O and misc chassis screws 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 | 2.5–3 mm | 0.4 mm | not stated | not stated | Screw list includes 'SCREW M2.0X2.5-I-NI-NYLOK' and 'SCREW I2*3M-NIHY (M2L3)', both explicit M2 metric threads used for internal boards | Confirmed |
Fitment records and sources
Screw list includes 'SCREW M2.0X2.5-I-NI-NYLOK' and 'SCREW I2*3M-NIHY (M2L3)', both explicit M2 metric threads used for internal boards
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 records span 2.5–3 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
- Apple Watch band lugs use a proprietary spring-bar/pin interface, not a metric screw - do not shop for an M-size there.
- Most consumer gadget teardowns (robot vacuums, toothbrushes, e-readers, VR headsets) list only the driver bit, not the thread — measure before ordering.
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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Devices whose records share a thread with Acer 5510/4020 series I/O and misc chassis screws, closest length match first.
- Lenovo YOGA 730-13IWL also M2 × 2.5 mm
- Dell 14 Plus DB14250 also M2 × 2.5 mm
- Lenovo ThinkPad L412 also M2 × 3 mm
- Lenovo ThinkPad R480 also M2 × 2.5 mm
- HP d5000"; all five pages checked, same PDF) also M2 × 2.5 mm
- Dell Inspiron 17 3780 also M2 × 3 mm
- HP ProBook 4416s also M2 × 3 mm
- HP ProBook 4410s also M2 × 3 mm
Questions about Acer 5510/4020 series I/O and misc chassis screws screws
- What size screw does Acer 5510/4020 series I/O and misc chassis screws use?
- M2 × 2.5–3 mm for screw list includes 'SCREW M2.0X2.5-I-NI-NYLOK' and 'SCREW I2*3M-NIHY (M2L3)', both explicit M2 metric threads used for internal boards.
- How long are the screws in Acer 5510/4020 series I/O and misc chassis screws?
- The records range from 2.5 to 3 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 5510/4020 series I/O and misc chassis screws?
- 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 5510/4020 series I/O and misc chassis screws?
- TechSpareWarehouse (our own store) lists M2 x 2.5mm and M2 x 3mm, which match lengths in the records above.