Value Collection 121103PR Set Screw 1/4-20 X 3/8 in Cone Point

Product Description

The VALUE COLLECTION 121103PR is a cone point set screw designed for positive locking and locating applications in mechanical assemblies. Manufactured from Grade 8 alloy steel, it delivers high tensile strength and hardness suitable for demanding industrial and trade environments. The 1/4-20 UNC thread and 3/8-inch overall length make it a compact fastener commonly installed in collars, hubs, pulleys, and shafts. Drive engagement is achieved with a 1/8-inch hex key. This fastener meets ASME/ANSI B18.3 and ASTM F912 standards, confirming dimensional and mechanical compliance for precision applications.

This set screw is used across a wide range of mechanical, HVAC, and industrial applications where a shaft or component must be secured to a mating part without a protruding head. The cone point geometry bites into the mating surface, providing strong rotational and axial holding force. It is well suited for permanent or semi-permanent installations where vibration resistance is a priority. Machinists, millwrights, HVAC technicians, and industrial maintenance professionals routinely install this type of fastener.

Key Features

• Cone point geometry for strong bite and positive locking into mating shaft surfaces
• Grade 8 alloy steel construction for high tensile strength and wear resistance
• 1/4-20 UNC thread form for broad compatibility with standard tapped holes
• 1/8-inch hex drive for use with standard hex keys and Allen wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and mechanical standards

Compatibility

Designed as a standard 1/4-20 UNC cone point set screw suitable for use in any tapped hole conforming to 1/4-20 thread specifications where a headless, flush-mount fastener is required.

Installation Notes

Installation requires a 1/8-inch hex key or Allen wrench. Ensure the mating component is fully secured and aligned before tightening. De-energize or lock out any machinery before servicing assemblies that contain set screws. Avoid overtightening, as cone point set screws can permanently deform soft mating surfaces.