Value Collection 721246PR Flat Socket Cap Screw 1/2-13

Product Description

The VALUE COLLECTION 721246PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastening profile. Sized at 1/2-13 UNC thread with an overall length of 4-1/2 inches, this screw is partially threaded and driven by a 5/16-inch hex socket. It is manufactured from alloy steel with a black oxide finish that provides mild corrosion resistance and reduces light glare on the fastener head. Machinists, millwrights, and maintenance technicians install this type of fastener in machine components, tooling fixtures, and structural assemblies where a low-profile head is required.

This flat socket cap screw is suited for general industrial and mechanical assembly work where a countersunk socket drive fastener is specified. The UNC thread form is standard in inch-system applications across manufacturing, fabrication, and maintenance environments. The partial threading is appropriate for applications involving thicker material stacks or where thread engagement is required only in the receiving component. Compliance with ASME/ANSI B18.3 and ASTM F835 makes it suitable for use in applications governed by those fastener standards.

Key Features

• Flat head profile allows flush or countersunk installation
• 5/16-inch hex socket drive for standard Allen wrench or hex bit
• 1/2-13 UNC thread form, compatible with standard inch-system tapped holes
• Partially threaded shank suits thicker material or clearance-hole applications
• Alloy steel construction provides strength appropriate for structural fastening
• Black oxide finish offers mild corrosion resistance and low-glare appearance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or standard-supply fastener for inch-system mechanical assemblies requiring a 1/2-13 UNC flat socket cap screw per ASME/ANSI B18.3 specifications.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 5/16-inch hex key or socket bit. The receiving hole should be properly countersunk to the correct flat-head angle before installation. Torque the fastener to the value specified by the assembly drawing or applicable fastener standard for the thread size and material grade. Power down and de-energize any equipment before performing fastener service on live machinery.