Cup Point Socket Set Screws

Cup Point Set Screws are one of the most widely used and versatile fastening solutions for mechanical assemblies that require secure, adjustable locking between components. These screws feature a concave cup-shaped point that bites into the mating surface, providing strong holding power while minimizing damage to the shaft or surface material. Manufactured to ANSI B18.3, ISO 4029, or DIN 916 specifications, cup point set screws are essential in power transmission, machinery, electronics, and industrial equipment where reliable, vibration-resistant fastening is required.

Constructed from hardened alloy steel, stainless steel, or case-hardened carbon steel, these screws deliver exceptional strength and wear resistance. Alloy steel versions often include a thermal baked black oxide finish, offering enhanced corrosion protection, improved torque control, and a clean, professional appearance. Stainless steel variants provide superior resistance to rust and oxidation, making them ideal for outdoor, marine, or high-humidity environments.

The cup point design allows the screw to embed slightly into the shaft, providing excellent resistance to both rotational and axial movement. This makes them particularly effective for securing collars, pulleys, gears, bushings, and rotating assemblies, where maintaining precise positioning under load and vibration is crucial.

Available in a full range of Fractional (UNC/UNF) and metric thread sizes, Cup Point Set Screws are tightened using an internal hex drive (Allen key) for easy installation in confined spaces.

Proudly manufactured to exacting industry standards, the Cup Point Set Screw offers a perfect balance of holding strength, precision alignment, and reusability. Its proven design makes it a trusted choice for engineers, maintenance professionals, and equipment builders who demand dependable performance in every fastening application.