Lenovo ThinkPad T550 screw size

Lenovo ThinkPad T550 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.

How to check the screw before you buy

1. 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.
2. Diameter: across the threads an M2 screw measures about 2 mm with calipers (usually a hair under). This device also uses M2.5, so measure each screw rather than assuming they match.
3. 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.
4. Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
5. The records span 2–4 mm, which means different positions take different lengths — match each hole to its own screw.
6. 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.
7. 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.

Pitch gauge · Screw size finder · Torque guide

More in Laptops & PCs

The same screw also fits

Devices whose records share a thread with Lenovo ThinkPad T550, closest length match first.

• HP ProBook Wi-Fi card also M2 × 3 mm
• Lenovo V310-15ISK also M2 × 2 mm
• Dell Inspiron 4150 also M2 × 3 mm
• Dell Latitude D620 also M2 × 3 mm
• HP EliteBook 8560p also M2 × 3 mm
• Dell XPS 14 9440 also M2 × 2.5 mm
• HP 250 G5 also M2 × 2 mm
• Acer Aspire 5730Z also M2 × 2 mm

Questions about Lenovo ThinkPad T550 screws

What size screw does Lenovo ThinkPad T550 use?

M2 × 2 mm for touchpad (qty 4, flat, black); M2 × 2.5 mm for display (qty 4, flat, black); M2 × 2.5 mm for speaker (qty 3, flat, black); M2 × 3 mm for card reader (qty 5, flat, black); M2 × 3 mm for power button (qty 2, flat, black); M2 × 3.5 mm for battery (qty 5, flat, silver); M2 × 3.5 mm for coin-cell battery (qty 2, flat, silver); M2 × 3.5 mm for hard drive (qty 1, flat, silver); M2 × 3.5 mm for SSD (qty 1, flat); M2 × 3.5 mm for system board (qty 6, flat, silver); M2 × 3.5 mm for unspecified (qty 2, flat, silver); M2 × 3.5 mm for wireless card (qty 1, flat); M2.5 × 2.5 mm for hinge (qty 6, broadhead, silver); M2.5 × 3.5 mm for display (qty 4, flat, silver); M2.5 × 4 mm for display (qty.

How long are the screws in Lenovo ThinkPad T550?

The records range from 2 to 4 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 Lenovo ThinkPad T550?

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 Lenovo ThinkPad T550?

TechSpareWarehouse (our own store) lists M2 x 2mm, M2 x 2.5mm and M2 x 3mm, which match lengths in the records above.