Value Collection 141113PR Set Screw 1/4-28 X 3/8 in Half Dog Point

Product Description

The VALUE COLLECTION 141113PR is a 1/4-28 UNF half dog point set screw manufactured from Grade 8 alloy steel. Set screws of this type are headless fasteners that thread fully into a tapped hole and bear against a shaft or mating surface to prevent rotational or axial movement. The half dog point extends beyond the thread to engage a drilled detent in the shaft, providing positive location and resistance to loosening under vibration. This screw measures 3/8 inches in overall length and is driven with a 1/8-inch hex key. It meets ASME/ANSI B18.3 and ASTM F912 standards. Machinists, millwrights, and maintenance technicians are the primary installers.

This set screw is suited for industrial machinery, motion control assemblies, shaft collars, pulleys, gears, and other mechanical components where a positive locating point is required. The half dog point design is preferred when the mating shaft has a pre-drilled detent hole, allowing the point to seat firmly and resist side loading. Applications span general manufacturing, conveyor systems, pump assemblies, and similar equipment requiring reliable shaft-to-hub retention. Sold individually per package with a minimum order quantity of 100 pieces.

Key Features

• Half dog point seats into pre-drilled shaft detents for positive, vibration-resistant location
• Grade 8 alloy steel construction provides high tensile and torsional strength
• 1/4-28 UNF thread for fine-thread engagement and stronger clamp load per thread
• 3/8 inches overall length suits standard shaft collar and hub installations
• 1/8-inch hex drive compatible with standard Allen keys and hex bit drivers
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and performance standards

Compatibility

Designed as an OEM-style replacement or stock fastener for any assembly requiring a 1/4-28 UNF half dog point set screw conforming to ASME/ANSI B18.3 and ASTM F912 specifications.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance technicians. Shut down and lock out all power to the equipment before servicing any shaft or rotating assembly per OSHA lockout/tagout requirements. Use a calibrated 1/8-inch hex key to drive the screw; do not use damaged or worn keys, as rounding the socket will complicate removal. Verify the mating shaft detent hole is properly sized and aligned with the set screw before fully seating the point.