Value Collection 015503BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 015503BR is a fully threaded hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and structural assemblies. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards, making it a reliable choice for demanding service environments. The 7/8-9 UNC thread form and 3/4-inch hex drive size allow for high-torque installation using standard hex keys or socket drivers. At 3 inches of length under head with full threading, this screw provides maximum thread engagement for secure clamping in a wide range of base materials.

This cap screw is suited for use in general industrial machinery, heavy equipment, fabrication work, and maintenance applications where a flush, socket-driven fastener is required. The black oxide coating provides moderate corrosion resistance and reduces light reflection, which is useful in both shop and field settings. It is commonly installed by machinists, millwrights, pipefitters, and maintenance mechanics working with steel plate, flanges, housings, or structural components.

Key Features

• 7/8-9 UNC thread size for compatibility with standard inch-series tapped holes
• 3 inches length under head, fully threaded for maximum thread engagement
• 3/4-inch hex drive size for high-torque installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish for moderate corrosion resistance and low-glare appearance
• Conforms to ASME/ANSI B18.3 and IFI 124 dimensional standards

Compatibility

Designed for use in standard inch-series tapped holes with 7/8-9 UNC thread form, typical of heavy-duty mechanical assemblies requiring ASME/ANSI B18.3 socket head cap screw dimensions.

Installation Notes

Installation should be performed by qualified mechanics or tradespeople using a calibrated torque wrench and the appropriate 3/4-inch hex key or socket driver. Ensure the mating tapped hole is clean, properly sized, and free of debris before installation. Apply thread lubricant or anti-seize as required by the assembly specification to achieve accurate clamp load. Follow applicable industry torque guidelines for 7/8-9 alloy steel fasteners per the governing engineering specification.