Lenovo B50-50 screw size

Lenovo B50-50 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. 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).
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 2.5–8 mm, which means different positions take different lengths — match each hole to its own screw.
6. Driver: the source names a Phillips drive. For comparison, standard M2 heads take PH0 (Phillips) or T6 (Torx), or a 1.5 mm hex key.
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 B50-50, closest length match first.

• Dell Inspiron 15 5598 also M2 × 3 mm
• NovelKeys NK65 keyboard plate and case also M2 × 5 mm
• Dell Latitude 5400 also M2 × 3 mm
• Dell XPS 13 9370 also M2 × 3 mm
• HP 245 G7 also M2 × 3 mm
• Lenovo ThinkPad Edge E220s also M2 × 3 mm
• Lenovo B50-45 also M2 × 3 mm
• Lenovo ideapad 500-14ISK also M2 × 3 mm

Questions about Lenovo B50-50 screws

What size screw does Lenovo B50-50 use?

M2 × 3 mm for display (qty 4, silver, Phillips); M2 × 3 mm for fan (qty 4, silver, Phillips); M2 × 3 mm for optical drive (qty 1, silver, Phillips); M2 × 3 mm for system board (qty 2, silver, Phillips); M2 × 5 mm for base cover (qty 8, black, Phillips); M2 × 5 mm for display (qty 4, black, Phillips); M2 × 5 mm for fan (qty 2, black, Phillips); M2 × 5 mm for hard drive (qty 4, black, Phillips); M2 × 5 mm for keyboard (qty 3, black, Phillips); M2 × 5 mm for optical drive (qty 1, black, Phillips); M2 × 5 mm for wireless card (qty 1, black, Phillips); M2 × 8 mm for base cover (qty 2, black, Phillips); M2 × 8 mm for battery (qty 2, black, Phillips); M2 × 8 mm for optical drive (qty 1, black, Phil.

How long are the screws in Lenovo B50-50?

The records range from 2.5 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 B50-50?

The source lists a Phillips 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 Lenovo B50-50?

TechSpareWarehouse (our own store) lists M2 x 3mm, M2 x 5mm and M2 x 8mm, which match lengths in the records above.