Value Collection 721349BR Flat Socket Cap Screw 1-1/4-7x8

Product Description

The VALUE COLLECTION 721349BR is a flat socket cap screw designed for structural and mechanical fastening applications where a flush or countersunk head profile is required. This screw features an 82-degree flat head with a 7/8-inch hex socket drive, allowing installation with a standard hex key or Allen-type driver. Manufactured from alloy steel with a black oxide finish, it provides added corrosion resistance in moderate environments. At 8 inches in overall length with a 1-1/4-7 UNC thread, the fastener is partially threaded, making it well-suited for clamping applications where a smooth shank is needed between mating surfaces.

This flat socket cap screw is commonly used in industrial machinery, structural assemblies, tooling fixtures, and heavy-duty mechanical equipment. The large diameter and long length make it appropriate for thick-section or multi-layer assemblies in manufacturing and fabrication environments. It follows ASME/ANSI B18.3 and ASTM F835 standards, ensuring dimensional consistency expected in commercial and industrial settings. Machinists, millwrights, and maintenance technicians are the typical installers.

Key Features

• 82-degree flat head for flush or countersunk installation
• 7/8-inch hex socket drive for high-torque installation with standard hex tooling
• Alloy steel construction for high tensile strength
• Black oxide finish for moderate corrosion resistance
• Partially threaded shank for clamping and alignment applications
• Meets ASME/ANSI B18.3 and ASTM F835 dimensional and material standards

Compatibility

Designed as a standard-dimension UNC flat socket cap screw per ASME/ANSI B18.3, compatible with tapped holes and threaded assemblies requiring a 1-1/4-7 UNC thread form and a countersunk 82-degree seating surface.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a properly sized hex key or hex drive tool. Ensure the mating hole is countersunk to 82 degrees to allow the flat head to seat flush. De-energize and lock out all equipment before servicing any fastened assembly per applicable OSHA lockout/tagout procedures. Inspect threads and mating surfaces for damage or contamination before installation.