Laptop Screw Set 450 650 720 PCS Countersunk Head Cross Groove 1.4mm Carbon Steel

When repairing a laptop, tablet, or other compact electronic device, having the right size fasteners makes all the difference. This machine screw set offers countersunk head screws with a cross groove design, allowing for a flush finish and easy manual twisting. Made from carbon steel grade 4.8 and finished with black plating, these screws provide practical strength for securing internal components. With box options of 450, 650, or 720 pieces, you can choose the quantity that matches your typical repair workload.

Features and Construction

Every screw in this set is built to consistent specifications, ensuring reliability for standard repair tasks. The following details describe the core attributes of these machine screws.

Material and Build

The screws are manufactured from carbon steel with a grade of 4.8, a common choice for general-purpose fasteners. This material offers adequate tensile strength for light to moderate fastening applications found in electronics assembly. The surface is treated with black plating, which provides a basic level of corrosion resistance and a uniform dark appearance.

Size and Practical Fit

Each screw has a diameter of 1.4mm and a length of 16mm, with a standard thread specification and a thread tolerance of 4h. The countersunk head design allows the screw to sit flush with the surface after installation, which is beneficial for tight spaces inside laptop casings. The cross groove (Phillips-type) enables straightforward manual driving with a standard screwdriver.

Uses and Placement

These screws are designed for use in electronics repair and assembly contexts where small fasteners are required. Their dimensions make them suitable for securing components such as hard drives, cooling fans, or keyboard brackets.

Event or Professional Use

For repair technicians working on multiple devices, choosing a larger box of 720 pieces ensures you have a ready supply for frequent tasks. The consistent specifications reduce time spent searching for matching fasteners, allowing for efficient workflow.

Everyday Home Use

Home hobbyists who occasionally repair laptops or upgrade memory modules will find the 450-piece box sufficient for several projects. The screws are easy to handle with basic tools and can be used in other small electronics that require countersunk M1.4 style fasteners.

Benefits and Buying Value

This screw set offers practical advantages for anyone who needs a stock of small, reliable fasteners. The key benefits centre on quantity options and standardised sizing.

Reuse and Low Maintenance

Because the screws are made from carbon steel with a protective black plating, they can be reused if removed carefully. Minimal maintenance is required – simply store them in a dry environment to prevent surface rust over time.

Why Choose This Product

With three box size options, you can select the quantity that matches your usage without overbuying. The screws meet grade A product standards, and the standard thread ensures compatibility with most matching nuts or threaded holes of the same specification.