Value Collection 88547377 Cup Point Set Screw 1/4-20 Grade 8

Product Description

The VALUE COLLECTION 88547377 is a Grade 8 steel cup point set screw in a 1/4-20 UNC thread size with an overall length of 1/4 inch. The cup point geometry bites into a shaft surface to create a firm, positive lock without requiring a through-hole. A 1/8-inch hex key drive allows installation in tight spaces where a standard bolt head would not fit. The black oxide finish provides light corrosion resistance and reduces surface glare. This fastener is sold in a package of 25 and is commonly installed by millwrights, machinists, maintenance technicians, and HVAC mechanics securing pulleys, collars, and hubs to shafting.

Cup point set screws of this size are widely used in light to medium industrial applications, including HVAC blower wheel assemblies, motor shaft collars, gear hubs, and general mechanical assemblies where a headless fastener is required. The 1/4-20 UNC thread is one of the most common inch-series coarse-thread standards, making this screw compatible with a broad range of tapped components across residential and commercial equipment.

Key Features

• Cup point geometry provides positive shaft engagement and resists rotation under load
• Grade 8 steel construction delivers high tensile strength for demanding mechanical assemblies
• 1/8-inch hex (Allen) drive for installation in recessed or confined locations
• Black oxide finish adds light corrosion resistance and reduces reflectivity
• 1/4-20 UNC thread standard ensures broad compatibility with inch-series tapped components
• Packaged in quantities of 25 to support bench stock and service van inventory

Compatibility

Designed as a standard 1/4-20 UNC cup point set screw suitable for use in any tapped bore or collar requiring a headless fastener of this thread size and length.

Installation Notes

Install and remove with a 1/8-inch hex key; use a calibrated torque driver where the assembly specifies a torque value to avoid stripping the socket or damaging the shaft. De-energize and lock out any equipment before servicing components secured by set screws. Do not substitute a lower-grade fastener in applications specified for Grade 8. Inspect the cup point for deformation before reuse, as a worn point reduces clamping effectiveness.