Value Collection 101311PR Set Screw 1/4-20 X 5/16 in Cup Point

Product Description

The VALUE COLLECTION 101311PR is a cup point set screw designed for mechanical assemblies where a fastener must apply holding force without protruding above a surface. Manufactured from Grade 8 alloy steel, this screw features a 1/4-20 UNC thread and measures 5/16 inches in overall length. The 1/8 inch internal hex drive accepts a standard hex key for installation and removal. It meets ASME/ANSI B18.3 and ASTM F912 standards, making it appropriate for applications that require dimensional and mechanical compliance. Machinists, millwrights, and maintenance technicians use cup point set screws to lock shafts, collars, pulleys, and gears in place.

This set screw is suited for light to medium-duty industrial and mechanical applications. The cup point geometry bites into the mating surface to resist rotation and axial movement, providing reliable holding power in shaft-to-hub connections. It is a fractional inch fastener on a UNC thread, common in general industrial, HVAC equipment, and mechanical drive assemblies. Sold individually with a minimum order quantity of 100 pieces, it is intended for professional use in production, maintenance, and repair environments.

Key Features

• Cup point geometry bites into mating surfaces for positive holding in shaft and collar assemblies
• 1/4-20 UNC thread with 5/16 inch overall length for compact, flush-mount fastening
• Grade 8 alloy steel construction provides high tensile and torsional strength
• 1/8 inch hex drive compatible with standard hex keys and Allen wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards

Compatibility

Designed as a standard fractional inch UNC set screw for use in mechanical assemblies, shaft collars, pulleys, gears, and similar hardware requiring a 1/4-20 threaded cup point fastener.

Installation Notes

Installation requires a 1/8 inch hex key. Ensure the mating shaft or surface is clean and free of debris before tightening. De-energize and lock out any rotating equipment before servicing fasteners in mechanical drive assemblies. Do not exceed the torque capacity appropriate for Grade 8 alloy steel at this thread size.