Value Collection 111265PR Set Screw 1/4-28 X 1/4 in Grade 8

Product Description

The VALUE COLLECTION 111265PR is a 1/4-28 UNF set screw with a knurled cup point, manufactured from Grade 8 alloy steel for high-strength clamping applications. Measuring 1/4 inch in overall length, it is driven by a 1/8-inch hex key and conforms to ASME/ANSI B18.3 and ASTM F912 standards. This type of fastener is installed by machinists, millwrights, and maintenance technicians to lock shafts, collars, pulleys, and similar components in position without a protruding head. The knurled cup point bites into the mating surface for improved retention under vibration and torque loads.

This set screw is suited for general industrial and mechanical assembly applications where a flush or recessed fastener is required. Typical uses include securing shaft collars, gear hubs, and handwheels in light to heavy machinery. The fine 1/4-28 UNF thread pitch provides precise depth adjustment and greater thread engagement per inch compared to coarse thread alternatives, making it appropriate for applications with thin wall sections or vibration-prone assemblies.

Key Features

• Knurled cup point for enhanced grip and bite into mating shaft or surface
• 1/4-28 UNF fine thread for precise positioning and strong thread engagement
• Grade 8 alloy steel construction for high tensile and proof load capacity
• 1/8-inch hex drive compatible with standard hex keys and Allen wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards
• Headless design allows fully recessed installation in shaft or hub

Compatibility

Designed as an OEM-style replacement or standard service fastener for mechanical assemblies requiring a 1/4-28 UNF knurled cup point set screw with a 1/8-inch hex drive.

Installation Notes

Installation is typically performed by a machinist, millwright, or qualified maintenance technician using a calibrated hex key of the correct 1/8-inch size. Always de-energize and lock out the equipment before tightening or removing set screws on rotating components. Thread the screw in by hand first to confirm proper engagement and avoid cross-threading. Do not reuse a set screw that shows deformation at the cup point, as reliable clamping force cannot be guaranteed.