Value Collection R63642843 Set Screw 1/4-20 X 3/8 in Cup Point Brass

Product Description

The VALUE COLLECTION R63642843 is a brass cup point set screw designed for secure, non-permanent fastening in mechanical assemblies. Threaded 1/4-20 UNC with an overall length of 3/8 inches, this screw seats into a mating threaded hole and locks components such as collars, hubs, pulleys, and shafts in place using a 1/8-inch hex key drive. The cup point tip bites into the mating surface to resist rotation and axial movement without a protruding head. Brass construction offers corrosion resistance and electrical conductivity where those properties are required. This screw is installed by machinists, maintenance mechanics, and industrial technicians across a wide range of applications.

This set screw is suited for use in light-duty mechanical assemblies where a fully recessed fastener is required. Typical applications include securing shaft collars, sprockets, and adjustment mechanisms in equipment where a protruding fastener head is not acceptable. Brass material makes it a practical choice in environments where galling on steel shafts is a concern or where non-magnetic and low-spark properties matter. Sold individually, with a minimum order quantity of 100 pieces per order.

Key Features

• 1/4-20 UNC thread for broad compatibility with standard inch-pattern tapped holes
• 3/8-inch overall length suits shallow engagement applications
• Cup point tip grips mating shaft surface to resist rotation and axial shift
• 1/8-inch hex key drive for installation with standard Allen keys
• Brass construction resists corrosion and reduces galling on softer shaft materials
• Fully recessed headless design allows flush or sub-flush installation

Compatibility

Designed as a standard inch-series set screw for use in any 1/4-20 UNC tapped hole requiring a headless cup point fastener.

Installation Notes

Installation is performed with a 1/8-inch hex key; ensure the key is fully seated before applying torque to avoid rounding the drive socket. Verify the mating threaded hole is clean and free of debris before threading in the screw. When used on rotating shafts, confirm the screw is tightened according to the equipment manufacturer's specification for the assembly being serviced. A thread-locking compound may be applied when vibration resistance is required.