Value Collection 88547393 Set Screw 1/4-20 X 3/8 in Cup Point Grade 8

Product Description

The VALUE COLLECTION 88547393 is a 1/4-20 UNC cup point set screw designed for secure, flush fastening in mechanical assemblies. Made from Grade 8 steel with a black oxide finish, this headless fastener is driven by a 1/8-inch hex key and measures 3/8 inches in overall length. The cup point tip bites into the mating surface to resist rotation and axial movement without requiring a protruding head. Machinists, millwrights, and maintenance technicians reach for this type of screw when locking collars, hubs, pulleys, and shafts in place on rotating or stationary equipment.

This set screw is suited for general industrial and mechanical applications where a low-profile, internal-drive fastener is required. Typical installations include shaft collars, set-screw shaft couplings, valve stems, and fixture work across light manufacturing, HVAC equipment assemblies, and plumbing component fabrication. The black oxide finish provides mild corrosion resistance and reduces light glare in precision environments. Each package contains 25 pieces, making it practical for bench stock or job-site replenishment.

Key Features

• Grade 8 steel construction for high tensile and torsional strength
• Cup point tip provides positive bite into mating shaft or surface
• 1/4-20 UNC thread for compatibility with standard tapped holes
• 1/8-inch hex drive keeps the fastener fully recessed when installed
• Black oxide finish for mild corrosion resistance in indoor environments
• Sold in a 25-piece package for convenient bench stock replenishment

Compatibility

Designed as a standard 1/4-20 UNC cup point set screw suitable for any tapped hole meeting that thread specification in shaft collars, hubs, couplings, and similar mechanical components.

Installation Notes

Installation is performed with a 1/8-inch hex key or Allen driver. Always de-energize or lock out any rotating equipment before installing or adjusting set screws on shafts or collars. Ensure the tapped hole is clean and free of debris before threading to avoid galling the Grade 8 steel. Do not substitute a smaller hex key, as rounding the socket will compromise the fastener and require extraction.