Value Collection 307204BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 307204BR is a hex socket cap screw designed for high-strength bolted connections in mechanical assemblies, structural fixtures, and industrial equipment. It features a 7/8-9 UNC thread and a 2-inch length under head with partial threading, allowing for clean engagement in through-hole and tapped applications. The 9/16-inch hex drive socket head accommodates a standard hex key or Allen wrench. Constructed from alloy steel with a black oxide finish, this fastener provides solid tensile strength and moderate corrosion resistance in controlled environments. It meets ASTM A574 requirements, the recognized standard for alloy steel socket-head cap screws.

This screw is suited for use in manufacturing, maintenance, and repair applications where a flush or recessed fastener head is required. Typical installations include machine bases, jig and fixture assemblies, pump housings, and structural brackets. The partial threading pattern makes it well suited for applications where the unthreaded shank must span a clearance hole before engaging a tapped bore. Machinists, millwrights, and maintenance technicians commonly specify this fastener type for precision equipment work.

Key Features

• 7/8-9 UNC thread for compatibility with standard coarse-thread tapped holes
• 2-inch length under head with partial threading for clearance-hole applications
• 9/16-inch hex drive for positive torque transfer with standard hex keys
• Alloy steel construction meets ASTM A574 socket head cap screw standard
• Black oxide finish provides mild corrosion resistance and reduces light reflection

Compatibility

Designed as an OEM-style and general-use replacement or supplemental fastener for assemblies requiring a 7/8-9 UNC coarse-thread hex socket cap screw with a 2-inch length under head.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 9/16-inch hex key or appropriate socket driver. Verify that the mating tapped hole meets the correct thread class before installation. Ensure threads and seating surfaces are clean and free of debris before torquing. Follow applicable torque specifications from the equipment manufacturer or recognized fastener standards such as those published by ASME or ASTM.