Value Collection 111571PR Set Screw 1/2-13 X 3/4 in Grade 8

Product Description

The VALUE COLLECTION 111571PR is a 1/2-13 x 3/4 inch knurled cup point set screw manufactured from Grade 8 alloy steel. Set screws of this type are headless fasteners designed to secure a component — such as a pulley, gear, or collar — against a shaft by bearing directly into the mating surface. The knurled cup point provides a firm bite and improved resistance to loosening under vibration. Drive is accomplished with a 1/4 inch hex key. This fastener meets ASME/ANSI B18.3 and ASTM F912 standards. Machinists, millwrights, and mechanical contractors install this type of fastener in industrial and commercial equipment maintenance applications.

This set screw is suited for general mechanical assembly and maintenance tasks where a flush or sub-flush fastener is required. The 1/2-13 UNC thread size and 3/4 inch overall length fit a wide range of standard shaft-and-hub assemblies. Grade 8 alloy steel construction makes it appropriate for higher-load or higher-torque applications where lower-grade fasteners would be inadequate. This SKU is sold in a minimum order quantity of 10 pieces, with each package containing 1 piece.

Key Features

• Knurled cup point digs into mating shaft surface for positive grip and vibration resistance
• Grade 8 alloy steel construction for high-strength, high-torque applications
• 1/4 inch hex key drive — compatible with standard hex wrenches and Allen keys
• 1/2-13 UNC thread form for broad compatibility with standard tapped holes
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and mechanical standards
• Headless design sits flush or below surface for clearance-critical installations

Compatibility

Designed as a standard 1/2-13 UNC knurled cup point set screw for use in shaft collars, shaft couplings, pulleys, gears, and similar mechanical assemblies requiring a Grade 8 alloy steel headless fastener per ASME/ANSI B18.3.

Installation Notes

Installation is performed by machinists, millwrights, or qualified mechanical technicians. Always de-energize and lock out the equipment before servicing any shaft or rotating assembly. Use a properly sized 1/4 inch hex key to seat the screw; do not use an undersized key as it may round the socket. Verify thread engagement and confirm the cup point is properly seated against the shaft before returning equipment to service.