Value Collection 111253PR Set Screw 1/4-20 X 1/2 in Grade 8

Product Description

The VALUE COLLECTION 111253PR is a 1/4-20 x 1/2 inch knurled cup point set screw manufactured from Grade 8 alloy steel. Set screws of this type are used to secure a component — such as a pulley, collar, or gear — onto a shaft by applying direct clamping force through the point. The knurled cup point bites into the mating surface to resist rotation and axial movement. Drive is via a 1/8 inch hex key socket. This fastener meets ASME/ANSI B18.3 and ASTM F912 standards and is sized in fractional inch measurements conforming to UNC thread standards.

This set screw is suited for mechanical assemblies found in HVAC equipment, pump and motor shaft collars, fan hubs, and general industrial applications where a flush or recessed fastener is required. The Grade 8 alloy steel construction provides high tensile and torsional strength, making it appropriate for applications with vibration or significant torque loads. It installs without a protruding head, allowing components to seat flush against mating surfaces. Minimum order quantity is 100 pieces.

Key Features

• Knurled cup point for positive grip and resistance to rotation on shaft surfaces
• 1/4-20 UNC thread for broad compatibility with standard tapped holes
• Grade 8 alloy steel for high strength in demanding mechanical environments
• 1/8 inch hex key drive for recessed installation in tight spaces
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Headless design allows flush or sub-flush installation

Compatibility

Designed as a standard 1/4-20 UNC set screw for use in any tapped through-hole or blind hole requiring a knurled cup point headless fastener conforming to ASME/ANSI B18.3 specifications.

Installation Notes

Installation is performed using a 1/8 inch hex key. Ensure the mating tapped hole is clean and free of debris before threading. Torque to the assembly specification provided by the equipment manufacturer. Always de-energize and lock out equipment before accessing shaft-mounted components secured by set screws.