Value Collection 721256PR Flat Socket Cap Screw 1/2-20

Product Description

The VALUE COLLECTION 721256PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features a 1/2-20 UNF thread and measures 2.5 inches in overall length. The 82-degree flat head seats flush with or below the work surface, eliminating protrusion in assembled components. Driven by a 5/16-inch hex socket, this screw is partially threaded and manufactured from alloy steel with a black oxide finish for corrosion resistance. It is installed by licensed tradespeople, maintenance technicians, and industrial assembly workers in mechanical, structural, and equipment fabrication applications.

This fastener is suited for use in machine assemblies, tooling fixtures, structural frames, and industrial equipment where a low-profile countersunk fastener is required. The UNF thread pitch provides fine-thread engagement, making it appropriate for high-strength applications and thin-material assemblies where vibration resistance is a priority. The partial thread shank is used where shank bearing strength or alignment is needed in through-bolt applications.

Key Features

• 82-degree flat head seats flush in standard countersunk holes
• 5/16-inch hex socket drive for precise torque application
• 1/2-20 UNF fine-thread for high-strength and vibration-resistant fastening
• Partially threaded shank for shank-bearing and alignment applications
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 standards
• Black oxide finish provides mild corrosion resistance and reduces light reflection

Compatibility

Designed as an OEM-style replacement or standard-service fastener for industrial machinery, structural assemblies, and equipment requiring a 1/2-20 UNF flat socket cap screw with an 82-degree countersink profile.

Installation Notes

Installation requires a 5/16-inch hex key or socket driver. Ensure the mating countersink is machined to an 82-degree included angle to achieve proper head seating. De-energize or lock out all equipment before replacing fasteners in powered assemblies. Follow applicable ASME and ASTM guidelines for torque values based on fastener grade and application requirements.