Value Collection 721190PR Flat Socket Cap Screw 5/16-24

Product Description

The VALUE COLLECTION 721190PR is a flat socket cap screw designed for flush or countersunk fastening applications where a low-profile head and high-strength material are required. It features an 82-degree flat head with a 3/16-inch hex socket drive and is made from alloy steel with a black oxide finish. The screw measures 5/16-24 UNF thread by 3 inches in overall length and is partially threaded. It is installed by machinists, maintenance technicians, and mechanical contractors working on machinery, fixtures, and structural assemblies that demand a recessed fastener profile.

This flat socket cap screw is suited for industrial and mechanical applications requiring a countersunk socket drive fastener. The 82-degree flat head allows the screw to seat flush with or below the surface of the mating material, making it appropriate for assemblies where protruding fastener heads are not acceptable. The alloy steel construction and black oxide finish provide strength and moderate corrosion resistance in indoor and light-duty service environments.

Key Features

• 82-degree flat head profile seats flush in standard countersunk holes
• 3/16-inch hex socket drive for precise torque application with a hex key or Allen driver
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 fastener standards
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• Partially threaded shank for improved shear strength in through-hole applications
• 5/16-24 UNF thread for fine-pitch engagement in tapped alloy or steel assemblies

Compatibility

Designed as an OEM-style and aftermarket replacement flat socket cap screw for industrial machinery, fixtures, and mechanical assemblies that use 5/16-24 UNF countersunk socket fasteners conforming to ASME/ANSI B18.3.

Installation Notes

Installation is performed by machinists or mechanical technicians using a properly sized 3/16-inch hex key or Allen driver. De-energize and lock out all equipment before fastener installation or removal in powered assemblies. Ensure the mating countersink is machined to an 82-degree included angle for full head seating. Do not exceed the rated torque range appropriate for the thread size and material class.