Value Collection 721330BR Flat Socket Cap Screw 1-8x6 in

Product Description

The VALUE COLLECTION 721330BR is a flat socket cap screw designed for applications requiring a low-profile, flush-mount fastening solution. This partially threaded screw measures 1-8 in thread size and 6 inches in length, constructed from alloy steel with a black oxide finish for corrosion resistance and reduced light reflection. The 82-degree flat head seats flush with the mating surface when countersunk correctly. Driven by a 5/8-inch hex key, it follows UNC thread standards and meets ASME/ANSI B18.3 and ASTM F835 specifications. Typically installed by machinists, millwrights, and maintenance technicians in mechanical assemblies, jigs, fixtures, and structural components.

This screw is suited for industrial, commercial, and mechanical maintenance applications where a flush head profile is required and high fastener strength is needed. The alloy steel construction provides the tensile strength necessary for demanding load-bearing connections. The black oxide finish is commonly specified in tool, die, and machine-build environments where surface appearance and mild corrosion protection are priorities. Partial threading allows the shank to act as a shoulder in through-hole assemblies, providing accurate part location and shear resistance.

Key Features

• 82-degree flat head for flush, countersunk installation
• Hex socket drive accepts a 5/8-inch hex key for high-torque application
• Partially threaded shank provides shoulder function and shear resistance
• Alloy steel construction for high tensile strength
• Black oxide finish offers mild corrosion resistance and low reflectivity
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNC flat socket cap screw for use in any application requiring a 1-8 thread, 6-inch length, countersunk hex-socket fastener per ASME/ANSI B18.3 and ASTM F835 specifications.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a 5/8-inch hex key or Allen driver. The mating countersink must be machined to an 82-degree angle to achieve a proper flush seat. Always verify the countersink depth and diameter before final assembly to avoid fastener protrusion or improper seating. Follow applicable industry standards and torque guidelines for the fastener grade and joint material when tightening.