Value Collection 721324BR Flat Socket Cap Screw 1-8x4

Product Description

The VALUE COLLECTION 721324BR is a flat socket cap screw engineered for precision fastening in structural and mechanical assemblies. It features an 82-degree flat head with a 5/8-inch hex socket drive, allowing flush or countersunk installation where a low-profile fastener head is required. The screw measures 1-8 thread size by 4 inches in overall length and is partially threaded along the shank. Constructed from alloy steel with a black oxide finish, it provides good corrosion resistance in controlled environments and meets ASME/ANSI B18.3 and ASTM F835 standards. Licensed tradespeople and skilled assemblers rely on this fastener for high-load applications requiring precise torque control.

This flat socket cap screw is suited for use in industrial machinery, tooling fixtures, die sets, and structural mechanical assemblies where a countersunk or flush-mount fastener is required. The UNC thread standard makes it compatible with standard inch-measurement tapped holes. The partially threaded shank supports shoulder-style clamping and precise part alignment in typical bolted joint configurations. It is appropriate for both original equipment manufacturing and maintenance and repair operations across industrial and trade environments.

Key Features

• 82-degree flat head profile for flush or countersunk installation
• 5/8-inch hex socket drive for high-torque wrench engagement
• 1-8 UNC thread form compatible with standard inch tapped holes
• Partially threaded shank supports accurate part clamping and alignment
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM F835 fastener standards
• Black oxide finish provides moderate corrosion resistance in dry or lightly oiled environments

Compatibility

Designed as a standard UNC inch-series flat socket cap screw for use in any 1-8 tapped hole requiring an 82-degree countersunk flat head fastener per ASME/ANSI B18.3.

Installation Notes

Installation requires a calibrated hex socket wrench or Allen key sized to the 5/8-inch drive. Ensure the mating countersink angle matches the 82-degree head geometry before torquing to avoid head deformation or improper seating. De-energize or lock out any associated equipment before fastener removal or installation in live assemblies. Refer to applicable ASME or machinery OEM torque specifications for the 1-8 thread class in use.