How long are the screws in Dell XPS 13/15 & Precision series bottom case screw?

The record gives 3 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.

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 XPS 13/15 & Precision series bottom case screw?

The source lists a Torx T5 drive. Standard M2 heads otherwise take PH0 (Phillips) or T6 (Torx), or 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 XPS 13/15 & Precision series bottom case screw?

TechSpareWarehouse (our own store) lists M2 x 3mm, which matches the length in the records above.

Dell XPS 13/15 & Precision series bottom case screw screw size

M2 · 3 mm long

Dell XPS 13/15 & Precision series bottom case screw takes M2 metric screws, 3 mm long.

The record covers retail listing explicitly specifies 'M2x3 T5 Torx' bottom case screws for Dell XPS 13/15 and Precision laptops.

Head and drive, as the source states them: Torx T5 drive.

This entry is marked confirmed and comes from ancientamerica.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 XPS 13/15 & Precision series bottom case screw 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	Torx T5	Retail listing explicitly specifies 'M2x3 T5 Torx' bottom case screws for Dell XPS 13/15 and Precision laptops	Confirmed

Fitment records and sources

M23mmconfirmed

Retail listing explicitly specifies 'M2x3 T5 Torx' bottom case screws for Dell XPS 13/15 and Precision laptops

pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6

Source

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 record states 3 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
Driver: the source names a Torx T5 drive. For comparison, standard M2 heads take PH0 (Phillips) or T6 (Torx), or a 1.5 mm hex key.
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

The standard M.2 SSD screw is M2 x 3mm, but some laptops and handhelds use non-standard lengths or head shapes.
'M2' is sometimes used loosely by resellers to mean 'roughly 2mm' without a real ISO metric thread; only counted here when the source datasheet explicitly states 'M2' thread.

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 Dell XPS 13/15 & Precision series bottom case screw, closest length match first.

Dell Inspiron 15 7579 2-in-1 also M2 × 3 mm
Lenovo B51-30 also M2 × 3 mm
Acer Aspire 5335 also M2 × 3 mm
Lenovo IdeaPad S300 also M2 × 3 mm
Lenovo ideapad 330R-14AST also M2 × 3 mm
Lenovo ideapad 320S-15ABR also M2 × 3 mm
Lenovo ideapad 320S-15AST also M2 × 3 mm
HP ProBook 650 G5 also M2 × 3 mm

Questions about Dell XPS 13/15 & Precision series bottom case screw screws

What size screw does Dell XPS 13/15 & Precision series bottom case screw use?: M2 × 3 mm for retail listing explicitly specifies 'M2x3 T5 Torx' bottom case screws for Dell XPS 13/15 and Precision laptops.
How long are the screws in Dell XPS 13/15 & Precision series bottom case screw?: The record gives 3 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
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 XPS 13/15 & Precision series bottom case screw?: The source lists a Torx T5 drive. Standard M2 heads otherwise take PH0 (Phillips) or T6 (Torx), or 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 XPS 13/15 & Precision series bottom case screw?: TechSpareWarehouse (our own store) lists M2 x 3mm, which matches the length in the records above.

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