Value Collection 307214BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 307214BR is a hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and structural assemblies. This screw features a 7/8-9 UNC thread size with a 3-1/2 inch length under head and a 9/16 inch hex drive socket. Manufactured from alloy steel and finished with a black oxide coating, it meets ASTM A574 standards for socket head cap screws. The partial threading configuration makes it well-suited for clamping and load-bearing joints where a smooth shank is required through the grip area. Installation and removal require a standard hex key or Allen driver in the 9/16 inch size.

This cap screw is used in a wide range of industrial and mechanical applications including machinery frames, tooling fixtures, hydraulic equipment, and structural steel assemblies. The coarse 7/8-9 UNC thread pitch is appropriate for general-purpose fastening in steel, cast iron, and similar ferrous materials. The black oxide finish provides mild corrosion resistance and reduces light reflection in precision machine environments. It is typically installed by machinists, millwrights, and maintenance technicians in manufacturing and fabrication settings.

Key Features

• 7/8-9 UNC coarse thread for reliable engagement in ferrous base materials
• 3-1/2 inch length under head with partial threading for shank grip clearance
• 9/16 inch hex socket drive for high-torque installation with standard Allen tools
• Alloy steel construction meets ASTM A574 high-strength socket head cap screw standard
• Black oxide coating provides mild corrosion resistance and a low-reflectance finish

Compatibility

Designed as a standard ASTM A574 hex socket cap screw for use in industrial machinery, structural assemblies, and tooling fixtures requiring a 7/8-9 UNC partially threaded fastener.

Installation Notes

Installation requires a 9/16 inch hex key or Allen driver rated for the torque demands of an ASTM A574 alloy steel fastener. Ensure the mating threaded hole is clean, properly tapped to 7/8-9 UNC, and free of debris before installation. Follow applicable torque specifications from ASME or the equipment manufacturer for this fastener grade and size. Do not use impact drivers unless the tool is rated for socket cap screw installation.