Lenovo B590 screw size

Lenovo B590 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 / M3, 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 3–8 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 B590, closest length match first.

• 2.5in drive trays & caddies also M3 × 4 mm
• Dell Latitude 3320 also M2 × 3 mm
• Dell Inspiron 14 5490 also M2 × 3 mm
• Lenovo ThinkPad T14s Gen 3 also M2.5 × 5 mm
• Lenovo YOGA 500-14ISK also M3 × 4 mm
• Lenovo ideapad 320L-17AST also M2 × 3 mm
• Lenovo E49 also M2 × 3 mm
• Lenovo IdeaPad Y580 also M2 × 3 mm

Questions about Lenovo B590 screws

What size screw does Lenovo B590 use?

M2 × 3 mm for hard drive (qty 1, flat, black); M2 × 3 mm for hinge (qty 4, flat, black); M2 × 3 mm for optical drive (qty 2, flat, black); M2 × 3 mm for palm rest (qty 3, flat, black); M2 × 3 mm for SSD (qty 1, flat, black); M2 × 3 mm for touchpad (qty 1, flat, black); M2 × 3 mm for unspecified (qty 2, flat, black); M2 × 3 mm for wireless card (qty 1, flat, black); M2 × 5 mm for I/O board (qty 2, flat, black); M2 × 5 mm for display (qty 6, flat, black); M2 × 5 mm for palm rest (qty 3, flat, black); M2 × 5 mm for system board (qty 2, flat, black); M2.5 × 5 mm for DC-in (qty 1, flat, black); M2.5 × 5 mm for display (qty 4, flat, black); M2.5 × 5.7 mm for speaker (qty 4, flat, black); M2.5 × 8 .

How long are the screws in Lenovo B590?

The records range from 3 to 8 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 B590?

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 B590?

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