How long are the screws in Ultrabook internals?

The records range from 2 to 3 mm depending on the position, so match each screw to its own hole.

What is the thread pitch of an M1.2 screw?

0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.

What screwdriver do I need for Ultrabook internals?

The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.

Can I use an imperial screw instead of M1.2?

No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.

Where can I buy replacement screws for Ultrabook internals?

TechSpareWarehouse (our own store) lists M1.2 x 2mm, which matches the length in the records above.

Ultrabook internals screw size

M1.2 · 2 to 3 mm long

Our records put Ultrabook internals on M1.2 screws in lengths from 2 to 3 mm.

The record covers small sensor / webcam / trackpad brackets on older ultrabooks.

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

For reference, M1.2 is 1.2 mm across the threads at 0.25 mm pitch. The imperial size people confuse it with: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute.

Ultrabook internals 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
M1.2	2–3 mm	0.25 mm	not stated	not stated	small sensor / webcam / trackpad brackets on older ultrabooks	Reported

Fitment records and sources

M1.22-3mmreported

small sensor / webcam / trackpad brackets on older ultrabooks

pitch 0.25 mm · tap 0.95 mm · clearance 1.4 mm · PH000 / JIS 00 / Torx T1–T2

Source

How to check the screw before you buy

Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
Diameter: across the threads an M1.2 screw measures about 1.2 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
Pitch: 0.25 mm from one thread crest to the next (40 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 2–3 mm, which means different positions take different lengths — match each hole to its own screw.
Driver: the source does not name the drive. Standard M1.2 heads take PH000 / JIS 00 for Phillips and T1–T2 for Torx; 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 M1.2 is about 5-8 N·cm into metal threads and 3-5 N·cm into plastic bosses; snug it up and stop.

Common mix-ups with M1.2

M1.2 and M1.4 look identical in an eyeglass repair kit — the wrong one strips soft acetate or metal hinges.

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 Ultrabook internals, closest length match first.

Arduino / small PCB stacks also M1.2 × 3 mm
Dell Alienware area51m R2 also M1.2 × 2.5 mm
Watch strap keepers also M1.2 × 2–3 mm
Anbernic RG35XX rear case screws also M1.2 × 3 mm
Dell Vostro 15 7590 also M1.2 × 2 mm
HP Spectre 13-v0xx also M1.2 × 2.5 mm
Dell Alienware m15 R4 also M1.2 × 2 mm
Dell Alienware m15 R2 also M1.2 × 2.1 mm

Questions about Ultrabook internals screws

What size screw does Ultrabook internals use?: M1.2 × 2–3 mm for small sensor / webcam / trackpad brackets on older ultrabooks.
How long are the screws in Ultrabook internals?: The records range from 2 to 3 mm depending on the position, so match each screw to its own hole.
What is the thread pitch of an M1.2 screw?: 0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.
What screwdriver do I need for Ultrabook internals?: The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.
Can I use an imperial screw instead of M1.2?: No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.
Where can I buy replacement screws for Ultrabook internals?: TechSpareWarehouse (our own store) lists M1.2 x 2mm, which matches the length in the records above.

Heads up: shipping delay