Value Collection 121127PR Set Screw 5/16-18 X 5/16 in Cone Point

Product Description

The VALUE COLLECTION 121127PR is a cone point set screw designed for mechanical fastening applications where a firm, biting hold is required against a shaft or mating surface. Manufactured from Grade 8 alloy steel, this fastener offers high tensile and torsional strength suitable for demanding industrial and trade environments. The screw measures 5/16-18 UNC thread with an overall length of 5/16 inches and is driven by a 5/32-inch hex key. It conforms to ASME/ANSI B18.3 and ASTM F912 standards. Machinists, millwrights, and maintenance mechanics are the primary installers of this type of fastener.

This set screw is used in applications where a threaded component must be locked to a shaft, such as collars, sprockets, pulleys, gears, and hubs in light to medium industrial machinery. The cone point geometry concentrates clamping force at a single contact point, making it well suited for permanent or semi-permanent installations into softer shaft materials. It is appropriate for both OEM assembly and field maintenance work in manufacturing, HVAC mechanical systems, and general industrial equipment.

Key Features

• Grade 8 alloy steel construction provides high tensile strength for secure shaft retention
• Cone point tip concentrates holding force for firm, positive engagement with the mating surface
• 5/16-18 UNC thread for broad compatibility with standard threaded holes
• 5/32-inch hex drive for use with standard hex keys and Allen wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and performance standards
• Fractional inch sizing for straightforward fitment in inch-standard mechanical assemblies

Compatibility

Designed as an OEM-style replacement or standard-stock set screw for any threaded assembly requiring a 5/16-18 UNC cone point fastener with a 5/16-inch overall length.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance mechanics using a 5/32-inch hex key or Allen wrench. De-energize and lock out all rotating equipment before installing or removing set screws per applicable OSHA lockout/tagout procedures. Do not exceed the rated torsional capacity of the fastener when applying drive torque. Inspect the mating shaft surface for proper condition before seating the cone point to ensure full engagement.