Value Collection 721404PR Flat Socket Cap Screw 7/16-14

Product Description

The VALUE COLLECTION 721404PR is a flat socket cap screw designed for flush or countersunk fastening applications in structural and mechanical assemblies. The 82-degree flat head seats flush with or below the mating surface, eliminating protrusions that could interfere with moving parts or mating components. Driven by a 1/4-inch hex socket, it delivers high torque transfer in tight spaces. The screw measures 7/16-14 UNC thread by 4 inches overall length and is partially threaded to ensure proper clamping force when joining thick material stacks. Made from alloy steel with a black oxide finish, it offers solid mechanical strength and moderate corrosion resistance for interior and protected environments. Licensed machinists, millwrights, and maintenance mechanics typically install this fastener type.

This flat socket cap screw suits light industrial, OEM machinery, tooling fixtures, and general mechanical assembly where a low-profile fastener head is required. The 7/16-14 UNC thread pitch is a widely used coarse-thread standard in inch-system mechanical applications. Partial threading is appropriate for joints where the unthreaded shank bridges the interface between two clamped members, maintaining clamp load without thread engagement in both parts. Black oxide finish is suitable for interior applications and oiled or greased environments where mild corrosion protection is acceptable.

Key Features

• 82-degree flat head for flush or countersunk installation without surface protrusion
• 1/4-inch hex socket drive for high-torque engagement in confined areas
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish offers moderate corrosion resistance and reduced light reflection
• Partially threaded shank supports proper clamping in thick-material joints
• Conforms to ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style and general-use replacement flat socket cap screw for inch-system mechanical assemblies requiring a 7/16-14 UNC thread and a countersunk 82-degree flat head seating.

Installation Notes

Installation is performed by machinists, millwrights, or qualified maintenance personnel. The mating countersink should be machined to an 82-degree included angle to match the head geometry before installation. De-energize or lock out all equipment per OSHA LOTO procedures before servicing any fastened assembly. Use a properly sized 1/4-inch hex key or socket driver to avoid rounding the drive recess.