This is the mini Screw mainly used on M.2 SSD NVMe card, WLAN cards, Laptop & Desktop internal Part, Cooling Fan, I/O Boards, Webcams, Laptop Bottom case, and even some Palmrests and Base plastics. Specification: Color: Black Material: Steel Finish: Nickel Plated Groove Type: Phillips Thread Thread size: M2.0 x 4.0 mm Shoulder Diameter: 1.851.98 mm Shoulder Length: 4.0 mm (Not included head) Head Diameter: 4.04.5 mm Head Thickness (Head Height): 0.70.8 mm Each pack includes: 10x M2x4 mm Phillips Flat Head Screws w/ Nickel (Black)