Value Collection -48409-7 Flat Socket Cap Screw 7/8-9

Product Description

The VALUE COLLECTION -48409-7 is a flat socket cap screw designed for applications that require a flush or countersunk fastener profile. It features an 82-degree flat head driven by a 9/16-inch hex socket, making it compatible with standard hex key and socket-drive tooling. The screw measures 7/8-9 UNC thread size at 3 inches overall length and is fully threaded. Manufactured from alloy steel with a black oxide finish, it delivers solid mechanical strength with moderate corrosion resistance. Machinists, millwrights, and maintenance technicians install these in machine frames, fixtures, and equipment assemblies where a low-profile head is required.

This fastener is suited for general industrial and mechanical assembly work in both shop and field environments. The 7/8-9 UNC thread pattern is a coarse unified national thread, commonly used in structural and mechanical fastening in North American manufacturing. Fully threaded construction provides consistent clamping force across the full length of engagement, which is particularly useful in thinner material applications or where maximum thread engagement is needed in a tapped hole.

Key Features

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

Compatibility

Designed as a standard inch-series flat socket cap screw for use in any tapped hole or assembly requiring a 7/8-9 UNC thread and an 82-degree countersunk seating surface per ASME/ANSI B18.3.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a 9/16-inch hex key or socket driver. Ensure the mating tapped hole is clean, properly sized, and free of debris before installation. Torque to the value specified by the equipment manufacturer or applicable engineering standard for alloy steel fasteners at this thread size. Power down and de-energize any equipment before servicing fasteners on live machinery.