Value Collection 015509BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 015509BR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and structural connections. The screw features a 7/8-9 UNC thread and a 4-inch length under head, with partial threading for controlled engagement in tapped holes. Constructed from alloy steel with a black oxide finish, it resists corrosion in moderate environments while maintaining the tensile strength required for demanding bolted joint applications. Installation uses a 3/4-inch hex drive, allowing high torque application with standard hex keys or drive tools. This fastener is installed by machinists, millwrights, and maintenance technicians.

This screw is suited for use in industrial machinery, fabricated steel assemblies, and heavy equipment where a high-strength, low-profile socket head fastener is required. Partial threading allows the unthreaded shank to bear shear loads, making it appropriate for precision-fit applications. The 7/8-9 UNC coarse thread provides reliable engagement in standard tapped steel components and is a common specification in North American industrial and OEM manufacturing environments.

Key Features

• 7/8-9 UNC coarse thread for standard tapped-hole compatibility
• 4-inch length under head for deep-reach fastening applications
• Partially threaded shank to support shear loads in precision assemblies
• Alloy steel construction for high tensile strength
• Black oxide finish provides moderate corrosion resistance and reduces light reflection
• 3/4-inch hex drive for high-torque installation with standard hex keys or socket tooling
• Meets ASME/ANSI B18.3, ASTM A574, and IFI 124 fastener standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 7/8-9 UNC partially threaded socket head fastener in alloy steel.

Installation Notes

Installation requires a 3/4-inch hex key or socket drive tool. De-energize and lock out all machinery before fastener service in powered equipment. Ensure the receiving tapped hole meets 7/8-9 UNC thread specifications and is free of debris before installation. Thread engagement depth and torque values should follow applicable engineering specifications for the joint design.