How long are the screws in Laptop hinge brackets (cross-brand)?

The records range from 3 to 4 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M2.5 screw?

0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.

What screwdriver do I need for Laptop hinge brackets (cross-brand)?

The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.

Can I use an imperial screw instead of M2.5?

No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Laptop hinge brackets (cross-brand)?

TechSpareWarehouse (our own store) lists M2.5 x 3mm and M2.5 x 4mm, which match lengths in the records above.

Laptop hinge brackets (cross-brand) screw size

M2.5 · 3 to 4 mm long

If you are replacing a screw on Laptop hinge brackets (cross-brand), the thread is M2.5 in lengths from 3 to 4 mm.

It is listed for hinge-to-palmrest and hinge-to-base retaining screws.

This entry is marked reported and comes from techsparewarehouse.com.

For reference, M2.5 is 2.5 mm across the threads at 0.45 mm pitch. The imperial size people confuse it with: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in.

Laptop hinge brackets (cross-brand) 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
M2.5	3–4 mm	0.45 mm	not stated	not stated	hinge-to-palmrest and hinge-to-base retaining screws	Reported

Fitment records and sources

M2.53-4mmreported

hinge-to-palmrest and hinge-to-base retaining screws

pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8

Source

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 M2.5 screw measures about 2.5 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.45 mm from one thread crest to the next (22.22 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 3–4 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M2.5 heads take PH1 for Phillips and T8 for Torx, and a 2 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 M2.5 is about 45-70 N·cm into metal threads and 20-35 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M2.5

Eurorack rail thread depends on rail brand: Vector/SynthRacks rails use M2.5, others use M3.
M2 and M2.5 are both marketed for turntable headshells; buyers must check which their specific cartridge/tonearm brand uses.

Pitch gauge · Screw size finder · Torque guide

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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The same screw also fits

Devices whose records share a thread with Laptop hinge brackets (cross-brand), closest length match first.

HP EliteBook 848 G3 also M2.5 × 3 mm
HP ProBook 430 G4 also M2.5 × 4 mm
HP ENVY x360 15 also M2.5 × 3 mm
Lenovo G510s Touch also M2.5 × 3 mm
Dell Inspiron 17 3785 also M2.5 × 4 mm
HP 2101473298; all three pages checked, same PDF) also M2.5 × 3 mm
Dell Latitude 3430 also M2.5 × 3 mm
Acer Emachines G630 also M2.5 × 4 mm

Questions about Laptop hinge brackets (cross-brand) screws

What size screw does Laptop hinge brackets (cross-brand) use?: M2.5 × 3–4 mm for hinge-to-palmrest and hinge-to-base retaining screws.
How long are the screws in Laptop hinge brackets (cross-brand)?: The records range from 3 to 4 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M2.5 screw?: 0.45 mm (coarse), which is the standard pitch for M2.5 machine screws; a 0.35 mm fine pitch exists but is uncommon. The tap drill is 2.05 mm and the normal clearance hole is 2.9 mm.
What screwdriver do I need for Laptop hinge brackets (cross-brand)?: The sources do not name the drive. For M2.5, Phillips heads normally take PH1 and Torx heads T8; socket heads take a 2 mm hex key.
Can I use an imperial screw instead of M2.5?: No. Imperial look-alike: #3-48 / #4-40 (2.51 / 2.84 mm) — #4-40 is the common US stand-in and it will NOT thread in. Use a true M2.5 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Laptop hinge brackets (cross-brand)?: TechSpareWarehouse (our own store) lists M2.5 x 3mm and M2.5 x 4mm, which match lengths in the records above.

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