Value Collection 40420 Cup Point Set Screw 1/2-13 Grade 8

Product Description

The VALUE COLLECTION 40420 is a cup point set screw designed for secure, non-permanent fastening in mechanical assemblies where a flush or recessed installation is required. Threaded 1/2-13 UNC with an overall length of 1-3/4 inches, this screw is manufactured from alloy steel to Grade 8 specifications, providing high tensile strength and resistance to shear forces. The cup point geometry bites into the mating surface to resist rotational and axial movement, making it well-suited for locking collars, hubs, pulleys, and shafts in place. Drive engagement is via a 1/4 inch hex key. This pack contains 25 pieces.

Cup point set screws of this specification are commonly used in industrial, mechanical, and HVAC equipment assemblies. Typical applications include shaft-to-hub connections on fan assemblies, motor pulleys, and drive components found in both commercial and residential mechanical systems. The 1/2-13 UNC thread size is a standard coarse-thread fastener widely encountered in general mechanical fabrication and equipment maintenance.

Key Features

• Cup point geometry provides firm grip on shaft surfaces to prevent rotation and axial movement
• Grade 8 alloy steel construction for high tensile and shear strength
• 1/2-13 UNC coarse thread for broad compatibility with standard tapped holes
• 1/4 inch hex key drive for precise torquing in tight or recessed installations
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards
• Sold in a 25-piece pack to support service inventory and bulk installations

Compatibility

Designed as a standard 1/2-13 UNC cup point set screw suitable for use in any application requiring an ASME/ANSI B18.3 compliant Grade 8 alloy steel headless set screw of this thread size and length.

Installation Notes

Installation is performed with a 1/4 inch hex key. Power down and de-energize any equipment before accessing shaft or hub fasteners. Ensure the tapped hole is clean and free of debris before threading. Do not overtighten beyond the requirements of the assembly, as cup point contact can permanently mark soft shaft materials.