Value Collection 121199PR Set Screw 1/2-13 X 1 in Cone Point

Product Description

The VALUE COLLECTION 121199PR is a 1/2-13 x 1-inch cone point set screw manufactured from Grade 8 alloy steel. Set screws are headless fasteners that thread fully into a tapped hole and bear directly against a mating surface to secure a component — such as a collar, gear, or pulley — against rotation or axial movement on a shaft. The cone point concentrates clamping force at a single contact area, providing strong resistance to loosening under vibration. Drive is a 1/4-inch hex socket. This fastener meets ASME/ANSI B18.3 and ASTM F912 standards and is sized in fractional inch measurements.

This set screw is used in mechanical assemblies across industrial, commercial, and maintenance applications where shaft-to-hub locking is required. Typical install scenarios include securing sheaves, sprockets, couplings, and collars to shafts. The cone point style is well suited for permanent or semi-permanent installations where the point is allowed to seat into a mating shaft depression. Machinists, millwrights, and maintenance technicians are the primary installers in both production and field-service environments.

Key Features

• Cone point geometry concentrates holding force for firm shaft engagement
• Grade 8 alloy steel construction provides high tensile and torsional strength
• 1/4-inch hex socket drive compatible with standard hex keys and T-handle drivers
• 1/2-13 UNC thread for broad compatibility with standard tapped holes
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Fractional inch sizing for straightforward specification and replacement

Compatibility

Designed as an OEM-style replacement or stock fastener for any 1/2-13 UNC tapped hole application requiring a cone point set screw per ASME/ANSI B18.3.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 1/4-inch hex key or Allen driver. Ensure the tapped receiving hole is clean, free of debris, and dimensionally correct for 1/2-13 UNC thread before installation. For cone point set screws, a small center-punch dimple in the shaft at the bearing point is recommended to prevent shaft damage and improve retention. Follow applicable facility or equipment manufacturer torque guidelines; do not use impact drivers on socket set screws.