Dell Inspiron 14 7490 screw size

Dell Inspiron 14 7490 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 M1.2 screw measures about 1.2 mm with calipers (usually a hair under). This device also uses M1.4 / M1.6 / M2, so measure each screw rather than assuming they match.
3. 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.
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 1.5–4.5 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 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.
7. 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.

Pitch gauge · Screw size finder · Torque guide

More in Laptops & PCs

The same screw also fits

Devices whose records share a thread with Dell Inspiron 14 7490, closest length match first.

• HP ProBook 4320s also M2 × 3 mm
• Dell G3 15 3590 also M2 × 2 mm
• Lenovo ideapad 710S-13ISK also M2 × 2 mm
• Dell Latitude D420 also M2 × 3 mm
• HP Pavilion dv2500 Entertainment also M2 × 2 mm
• Lenovo ideapad 330S-14AST U also M1.6 × 2.5 mm
• Acer Aspire 7230 also M2 × 3 mm
• Lenovo Legion M.2 SSD also M2 × 3 mm

Questions about Dell Inspiron 14 7490 screws

What size screw does Dell Inspiron 14 7490 use?

M1.2 × 1.5 mm for keyboard (qty 28); M1.4 × 2.3 mm for fan (qty 1); M1.4 × 2.3 mm for power button (qty 2); M1.6 × 2 mm for touchpad (qty 4); M1.6 × 2.5 mm for unspecified (qty 1); M1.6 × 2.5 mm for wireless card (qty 1); M2 × 2 mm for battery (qty 4); M2 × 3 mm for I/O board (qty 3); M2 × 3 mm for fan (qty 3); M2 × 3 mm for heat sink (qty 5); M2 × 3 mm for SSD (qty 1); M2 × 3 mm for system board (qty 1); M2 × 3 mm for wireless card (qty 1); M2 × 3.5 mm for base cover (qty 6); M2 × 3.5 mm for display (qty 3); M2 × 3.5 mm for USB-C board (qty 1); M2 × 4.5 mm for hinge (qty 4).

How long are the screws in Dell Inspiron 14 7490?

The records range from 1.5 to 4.5 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 Dell Inspiron 14 7490?

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 Dell Inspiron 14 7490?

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