Value Collection 721304BR Flat Socket Cap Screw 7/8-9x3 in

Product Description

The VALUE COLLECTION 721304BR is a flat socket cap screw designed for applications requiring a flush or countersunk fastener profile. Machined from alloy steel with a black oxide finish, this screw features an 82-degree flat head and a 9/16-inch hex socket drive. The 7/8-9 UNC thread runs fully along the 3-inch overall length, making it suitable for through-hole and deep-thread assemblies. It meets ASME/ANSI B18.3 and ASTM F835 standards. Licensed tradespeople and machine-shop professionals install this fastener where a low-profile, high-strength connection is required.

This screw is used in heavy equipment, industrial machinery, structural assemblies, and fabrication work where a countersunk socket drive fastener is specified. The fully threaded shank provides maximum thread engagement over the full fastener length. Black oxide finish offers mild corrosion resistance and reduces light reflection in tooling and fixture applications. Sold individually, it is suited for maintenance, repair, and original equipment manufacturing environments that require precise fastener selection by thread size and length.

Key Features

• 82-degree flat head profile seats flush in countersunk holes
• 9/16-inch hex socket drive for standard Allen or hex key installation
• 7/8-9 UNC fully threaded, 3-inch overall length
• Alloy steel construction for high tensile strength
• Black oxide finish provides mild corrosion and abrasion resistance
• Meets ASME/ANSI B18.3 and ASTM F835 fastener standards

Compatibility

Designed as an OEM-style and replacement flat socket cap screw for industrial, manufacturing, and mechanical assembly applications requiring a 7/8-9 UNC thread with an 82-degree countersunk head profile.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated hex key or Allen driver sized to 9/16 inch. Ensure mating countersink angle matches the 82-degree head angle before installation to achieve proper seating and load distribution. Always verify thread engagement depth and hole clearance before torquing. De-energize or lock out any equipment per OSHA LOTO procedures before replacing fasteners in live machinery.