Value Collection 211317PR Flat Socket Cap Screw 1/2-20x2

Product Description

The VALUE COLLECTION 211317PR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. It features an 82-degree flat head driven by a 5/16-inch hex socket and is fully threaded along its 2-inch overall length. The 1/2-20 UNF thread specification indicates a fine-thread pitch suited for precision assemblies where vibration resistance or tight tolerance fits are priorities. Manufactured from alloy steel with a black oxide finish, the screw offers solid mechanical strength and moderate corrosion resistance. This fastener is installed by machinists, millwrights, maintenance technicians, and mechanical contractors working on structural, mechanical, or equipment assemblies.

This screw is well suited for machine assembly, jig and fixture construction, tooling, and general mechanical fabrication where a low-profile head is required to sit flush with or below a mating surface. The fine 1/2-20 UNF thread makes it appropriate for use in applications requiring precise thread engagement and controlled clamp load. It conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards, making it compatible with controlled-specification assembly environments in both light industrial and commercial settings.

Key Features

• 82-degree flat head profile for flush or countersunk installations
• 5/16-inch hex socket drive for secure torque application
• 1/2-20 UNF fine-thread specification for vibration-resistant, precision assemblies
• Fully threaded 2-inch overall length for maximum thread engagement
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish provides mild corrosion protection and reduces light reflectance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard-specification flat socket cap screw for use in any application requiring a 1/2-20 UNF fully threaded countersunk fastener conforming to ASME/ANSI B18.3 and ASTM F835.

Installation Notes

Installation requires a 5/16-inch hex key or socket driver rated for the applicable torque. Ensure the mating countersink is machined to an 82-degree included angle for proper head seating. Power down and de-energize any equipment before fastener removal or installation in live mechanical assemblies. Apply thread lubricant or thread-locking compound only as specified by the assembly engineering documentation.