Value Collection 011521BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 011521BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Sized at 7/8-9 UNC with a 7-inch length under head, this fastener is driven by a 3/4-inch hex socket. Constructed from alloy steel and finished with a black oxide coating, it provides corrosion resistance and a consistent surface hardness. This screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for demanding load-bearing connections where tensile strength and dimensional precision are required.

This cap screw is suited for heavy-duty mechanical and industrial installations where large-diameter, high-strength fasteners are specified. Typical applications include machine bases, structural frame assemblies, tooling fixtures, and equipment mounting where a recessed drive and controlled clamping force are necessary. The 7/8-9 UNC thread pitch is commonly specified in engineering drawings for inch-standard assemblies requiring robust thread engagement.

Key Features

• 7/8-9 UNC thread size with 7-inch length under head for deep fastening reach
• Partially threaded shank provides a bearing surface for shear-load applications
• 3/4-inch hex drive for high-torque socket wrench installation
• Alloy steel construction rated to ASTM A574 for high tensile strength
• Black oxide finish reduces surface corrosion and minimizes light reflection in service environments
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard inch-series hex socket cap screw suitable for use in any assembly specifying 7/8-9 UNC partially threaded socket head fasteners per ASME/ANSI B18.3.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a calibrated torque wrench with the appropriate 3/4-inch hex socket bit. Always degrease and inspect the tapped hole before installation to ensure clean thread engagement. Do not exceed the engineered torque specification for the mating material as defined by the application design drawings. Follow applicable industry and facility safety standards when working with high-strength fasteners under load.