Value Collection 581760BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 581760BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from alloy steel with a black oxide finish, this fastener delivers corrosion resistance and reduced light reflection in service environments. The 7/8-9 UNC thread form provides coarse-thread engagement suited for thick or high-load joints. At 7.5 inches length under head, it accommodates deep grip applications that standard-length cap screws cannot reach. Installation requires a 3/4-inch hex drive key or socket. This fastener is typically installed by millwrights, machinists, maintenance technicians, and mechanical contractors working to ASME and ASTM specifications.

This cap screw is appropriate for heavy-duty bolted joints in manufacturing equipment, machine frames, fixtures, and structural steel assemblies where a recessed drive head is preferred over a hex bolt profile. Partial threading allows the unthreaded shank to act as a shoulder or alignment feature in through-bolt applications. The black oxide finish is suitable for indoor and lightly controlled environments where moderate corrosion protection is acceptable.

Key Features

• 7/8-9 UNC coarse thread for reliable high-load engagement
• 7.5 inches length under head accommodates deep grip requirements
• Partially threaded shank provides shoulder alignment in through-bolt applications
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish offers surface protection and low-reflectance appearance
• 3/4-inch hex drive compatible with standard hex keys and socket drivers

Compatibility

Designed as a standard-specification replacement or new-install fastener for any application requiring a 7/8-9 UNC partially threaded socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574.

Installation Notes

Installation should be performed by qualified mechanical or maintenance personnel using a calibrated torque wrench and a properly sized 3/4-inch hex drive tool. Always clean and inspect threaded holes before installation to prevent cross-threading or false torque readings. Follow applicable torque specifications from the equipment OEM or ASME standards for the fastener grade and size. Do not reuse fasteners that show signs of thread deformation, corrosion damage, or previous overtorque.