Laptop Screw Set: 450PCS, 650PCS or 720PCS Black Carbon Steel Machine Screws for Repair

This set provides a bulk supply of small-dimension machine screws specifically suited for the internal assembly and repair of laptops, small electronics, and other precision devices. Offering a choice of three different quantities—450, 650, or 720 pieces per box—it allows you to select a volume that matches your anticipated usage, whether for a one-off repair job or to maintain a stock of spares for workshop use. The screws are manufactured from carbon steel with a grade of 4.8 and finished with a black plating, presenting a functional and cost-effective fastener solution for a wide range of light-duty applications.

Features and Construction

The set comprises precision-made machine screws built to consistent specifications, ensuring reliable fit and performance in their intended applications.

Material and Build

The screws are constructed from carbon steel graded at 4.8, a common specification for general-purpose fasteners which provides a standard level of tensile strength. The surface is treated with a black plating, which offers a uniform dark appearance and provides a basic degree of protection against oxidation. The product is classified as Grade A, indicating a standard level of manufacturing quality suitable for repair and assembly tasks.

Size and Practical Fit

Each screw has a diameter of 1.4mm and a length of 16mm, dimensions commonly required for securing internal frames, brackets, and components within laptops and compact electronics. The thread follows a standard specification with a tolerance of 4h, designed to engage cleanly with corresponding threaded holes or nuts. The combination of a small diameter and 16mm length makes these screws appropriate for tasks where a low-profile, secure fastening point is needed without excessive protrusion.

Uses and Placement

With their specific sizing and design, these screws are versatile for both professional repair work and hobbyist projects involving small-scale assembly.

Event or Professional Use

For IT technicians, electronics repair specialists, or workshop environments, the larger 720PCS or 650PCS boxes offer an economical bulk supply. This reduces the need for sourcing individual screws for each job and ensures a ready stock of the correct size for common laptop models and other small devices. The standardised 1.4mm diameter and 16mm length are frequently specified in device service manuals.

Everyday Home Use

The 450PCS box provides a sufficient quantity for the DIY enthusiast or homeowner tackling occasional laptop repairs, reassembling small gadgets, or working on craft projects that require minute fasteners. The countersunk head design allows the screw to sit flush with or below the surface of the material, which is often necessary in the confined spaces of electronic chassis.

Benefits and Buying Value

Choosing this screw set offers practical advantages centred on convenience, specification matching, and cost-effective bulk purchasing.

Reuse and Low Maintenance

The carbon steel construction and black plating are durable enough for screws that may be reused several times during repair and testing procedures. As a dry-goods item, the screws require no ongoing maintenance; simply store the box in a dry location to preserve the finish. Having a stock on hand eliminates delays waiting for small parts to arrive.

Why Choose This Product

The primary value lies in the precise match of the screw specifications—countersunk head, cross groove, 1.4mm diameter, 16mm length—to a common need in small device repair. The option of three different box sizes lets you pay only for the quantity you are likely to use, avoiding waste. It is a straightforward, no-fuss component supply that supports efficient repair work by providing the correct physical part.