Value Collection R63266841 Set Screw 5/16-18 X 1/4 in Cup Point

Product Description

The VALUE COLLECTION R63266841 is a cup point set screw designed for secure fastening in mechanical assemblies where a protruding head is not acceptable. Threaded 5/16-18 UNC with an overall length of 1/4 inch, this headless fastener is driven by a 3/32-inch hex key and seats with a cup point that bites into the mating surface to resist rotation and axial movement. Constructed from Grade 18-8 stainless steel, it offers solid corrosion resistance for general industrial and mechanical applications. Licensed trades and maintenance professionals rely on set screws like this for securing collars, pulleys, gears, and hubs to shafts without adding external hardware bulk.

This set screw is suited for residential and light commercial mechanical installations where stainless steel fastener material is specified for moisture-exposed or corrosion-sensitive environments. Common applications include HVAC equipment assemblies, pump components, fan hubs, shaft collars, and general machinery where a flush or recessed fastener is required. The cup point geometry provides positive grip on both hardened and softer shaft materials, making it a versatile choice across a range of service conditions.

Key Features

• Cup point tip bites into shaft surface for strong rotational and axial hold
• Grade 18-8 stainless steel construction for corrosion resistance in wet or outdoor environments
• 5/16-18 UNC threading for broad compatibility with standard tapped holes
• Headless design allows flush or sub-flush installation in collars, hubs, and housings
• 3/32-inch hex drive accepts standard hex keys and ball-end drivers
• Overall length of 1/4 inch suits shallow-depth fastening applications

Compatibility

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

Installation Notes

Set screws are installed by mechanical trades and general maintenance technicians using a hex key or hex driver sized to the specified 3/32-inch drive. Ensure the receiving shaft or bore surface is clean and free of debris before seating the cup point. Do not exceed the torque appropriate for 18-8 stainless steel fasteners at this thread size, as over-torquing can gall stainless threads. A thread-locking compound may be applied where vibration resistance is required.