Value Collection 721240PR Flat Socket Cap Screw 1/2-13

Product Description

The VALUE COLLECTION 721240PR is a flat socket cap screw designed for bolted assemblies where a flush or countersunk head profile is required. Machined from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and a clean appearance in demanding mechanical and structural applications. It features a 5/16-inch hex socket drive, a 1/2-13 UNC thread, and an overall length of 3-1/4 inches with partial threading. Machinists, millwrights, and maintenance technicians install this type of fastener where a low-profile head is needed to clear adjacent components or sit flush with a mating surface.

This flat socket cap screw is suited for use in general industrial machinery, fixtures, jigs, and fabricated assemblies where a countersunk socket fastener meets design or clearance requirements. The partial threading allows for positive clamping force across a greater grip length, making it appropriate for thicker material stacks. It conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards, making it a reliable choice for applications that specify dimensional and mechanical compliance with those standards.

Key Features

• Flat head profile allows flush or countersunk seating in mating surfaces
• 5/16-inch hex socket drive for standard Allen key or hex bit installation
• 1/2-13 UNC thread form for broad compatibility with standard tapped holes
• Partial threading provides extended grip length for thicker material applications
• Alloy steel construction with black oxide finish for corrosion and wear resistance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-use fastener for applications requiring a 1/2-13 UNC flat socket cap screw per ASME/ANSI B18.3 and ASTM F835 specifications.

Installation Notes

Install using a calibrated 5/16-inch hex key or hex socket bit. A properly sized and deburred countersunk hole is required in the mating material to achieve correct head seating. Torque to the value specified by the assembly engineer or relevant fastener standard for the material stack and clamp load requirement. Always inspect threads and seating surfaces for damage before installation.