Value Collection 721242PR Flat Socket Cap Screw 1/2-13

Product Description

The VALUE COLLECTION 721242PR is a flat socket cap screw engineered for applications requiring a flush or countersunk fastener profile. It features a 1/2-13 UNC thread and measures 3-1/2 inches in length with partial threading along the shank. The 82-degree flat head seats cleanly into countersunk holes, and the hex socket drive accepts a 5/16-inch hex key for installation. Manufactured from alloy steel with a black oxide finish, this screw delivers solid tensile strength and moderate corrosion resistance. It meets ASME/ANSI B18.3 and ASTM F835 standards. Licensed trades and maintenance professionals use this fastener in structural assemblies, machine frames, and equipment enclosures where a low-profile head is required.

This fastener is suited for industrial, commercial, and mechanical assembly applications where a countersunk socket cap screw is specified. The 1/2-13 UNC thread is a standard coarse-thread designation common across North American machine and structural work. The black oxide finish provides light corrosion resistance and reduces surface glare, making it appropriate for interior mechanical assemblies, equipment panels, and maintenance applications. Millwrights, machinists, and maintenance technicians typically install this fastener in environments where head protrusion cannot be tolerated.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 1/2-13 UNC coarse thread for broad compatibility with standard tapped holes
• 3-1/2 inches overall length with partial threading
• 5/16-inch hex socket drive for secure torque application
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 standards
• Black oxide finish provides light surface protection and low-glare appearance

Compatibility

Designed as a standard 1/2-13 UNC flat socket cap screw for use in countersunk applications conforming to ASME/ANSI B18.3 fastener specifications.

Installation Notes

Installation requires a 5/16-inch hex key or Allen driver. Verify that the mating countersink is machined to the correct 82-degree angle before seating the fastener. Confirm thread engagement depth meets the requirements of the assembly design before applying final torque. Always inspect threads for damage before installation and replace any fastener showing signs of galling or deformation.