Value Collection 88547591 Set Screw 5/16-18 X 1/4 in Cup Point Grade 8

Product Description

The VALUE COLLECTION 88547591 is a cup point set screw designed for mechanical assemblies where a fastener must seat flush or below a surface and hold a component in place on a shaft or within a bore. Manufactured from Grade 8 alloy steel, this screw delivers high tensile and torsional strength suited to demanding industrial and trade applications. The 5/16-18 UNC thread and 1/4-inch overall length make it appropriate for compact assemblies with limited axial space. A 5/32-inch hex key drive allows precise installation torque. Sold in a pack of 25 pieces, this fastener is a common stock item for maintenance shops, millwrights, and mechanical contractors.

Cup point set screws are used wherever a shaft-to-hub connection must be secured without a protruding fastener head. Typical applications include motor shaft collars, pulley hubs, gear assemblies, and positioning fixtures in light to medium industrial equipment. The cup point geometry bites into the shaft surface to resist rotational and axial movement under load. This size is frequently encountered in HVAC blower wheel assemblies, pump impeller hubs, and general mechanical equipment service work.

Key Features

• Grade 8 alloy steel construction for high tensile and torsional strength
• Cup point geometry bites into shaft surface to resist axial and rotational movement
• 5/16-18 UNC thread for broad compatibility with standard tapped holes
• 1/4-inch overall length suits compact, space-constrained assemblies
• 5/32-inch hex key drive for precise installation with common hand tools
• Pack of 25 pieces for bench stock and service van inventory

Compatibility

Designed as a standard UNC set screw for use in any tapped 5/16-18 through-hole or blind hole requiring a headless cup point fastener in Grade 8 alloy steel.

Installation Notes

Installation is performed with a 5/32-inch hex key or Allen-type driver. Ensure the mating tapped hole is clean and free of debris before threading. De-energize and lock out any rotating equipment before servicing shaft-mounted components. Do not exceed the rated drive torque for the fastener size, and confirm thread engagement is adequate before applying load.