Value Collection 101581PR Set Screw 1/2-13 X 1-3/4 in Cup Point

Product Description

The VALUE COLLECTION 101581PR is a cup point set screw designed for secure fastening applications where a hardened point is needed to bite into a mating surface and resist rotational or axial movement. Manufactured from Grade 8 alloy steel, this screw delivers high tensile strength suitable for demanding industrial and mechanical assemblies. The 1/2-13 UNC thread with an overall length of 1-3/4 inches and a 1/4-inch hex drive makes it compatible with standard hex keys and Allen wrenches. It conforms to ASME/ANSI B18.3 and ASTM F912 standards, ensuring dimensional consistency across the fastener.

This set screw is used in shaft-to-hub connections, collars, pulleys, gears, and similar mechanical assemblies where a headless, flush-mount fastener is required. The cup point configuration creates a slight indentation in the mating shaft surface, providing a positive grip under load. It is appropriate for both original equipment manufacturing and maintenance or repair work across industrial, HVAC, and mechanical service applications. Installation is handled by machinists, millwrights, and field service technicians using standard hex key tooling.

Key Features

• Cup point geometry bites into mating shaft surface for strong rotational and axial holding force
• Grade 8 alloy steel construction provides high tensile and proof-load strength
• 1/2-13 UNC thread form for broad tooling and hardware compatibility
• 1/4-inch hex drive accepts standard Allen wrenches and hex key sets
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Headless design sits flush with or below the surface of the mating component

Compatibility

Designed as a standard UNC set screw for use in shaft collars, hubs, pulleys, gears, and mechanical assemblies requiring a 1/2-13 threaded fastener with a cup point.

Installation Notes

Always de-energize and lock out any equipment before installing or removing set screws from rotating shafts or assemblies. Use a properly sized 1/4-inch hex key to avoid rounding the drive socket. Verify thread engagement depth meets the requirements of the assembly design before applying final seating torque. Follow applicable ASME or equipment manufacturer guidelines for fastener installation in safety-critical applications.