Phillips Head Countersunk Screw Assembly

The Brass Phillips Head Countersunk Screw with Flat Washer, Spring Washer, and Nut Assembly is a common modular fastener, pre-assembled from four parts: a Phillips head countersunk brass screw, a brass flat washer, a brass spring washer, and a brass hexagonal nut. No separate washers and nuts are required during use. This assembly conforms to national standards (GB/T 9074.1) and is indispensable in applications requiring smooth surfaces, reliable anti-loosening, good conductivity, and corrosion resistance, such as electrical panels, instruments, lighting assembly, and furniture manufacturing. It provides a comprehensive function of rapid assembly, pressure distribution, anti-loosening, and maintaining a smooth, protrusion-free mounting surface. To enhance the anti-loosening performance and service life of the assembly, we can heat-treat the spring washers to improve their elastic limit, or precision-stamp the Phillips head groove of the screw head to improve engagement efficiency. This also improves the overall assembly reliability and durability of the assembly.

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