Value Collection 581767BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 581767BR is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, structural connections, and industrial fabrication. Manufactured from alloy steel with a black oxide finish, this fastener provides corrosion resistance and reduced light reflection in service environments. It measures 12 inches in length under the head and uses a 3/4-inch hex drive, making it compatible with standard hex keys and socket drivers. Conforming to ASME/ANSI B18.3 and ASTM A574 standards, this screw is suited for applications where tensile strength and dimensional consistency are critical. Licensed trades and industrial maintenance technicians are the primary installers.

This fastener is appropriate for use in heavy-duty mechanical assemblies, equipment mounting, and structural bolting applications requiring a 7/8-9 UNC thread form. The 12-inch length under head accommodates thick material stacks or deep-reach installations. The partial threading is typical for applications where a smooth shank is needed to pass through a clearance hole before engaging a tapped bore, providing better shear load distribution across the joint. It is well-suited for maintenance, repair, and original equipment manufacturing environments.

Key Features

• 7/8-9 UNC thread size for high-load fastening in standard unified coarse thread applications
• 12-inch length under head accommodates deep material stacks and long-reach installations
• Alloy steel construction meets ASTM A574 requirements for mechanical strength
• Black oxide finish provides mild corrosion resistance and reduced surface reflectivity
• Partially threaded shank improves shear load distribution in clearance-hole installations
• 3/4-inch hex drive compatible with standard hex keys and socket drive tools

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 compliant hex socket cap screw for use in any application requiring a 7/8-9 UNC partially threaded fastener with a 12-inch length under head.

Installation Notes

Install using a calibrated torque wrench with a 3/4-inch hex bit or hex key to achieve proper clamp load without yielding the fastener. Ensure the tapped bore is clean and free of debris before engagement. Power down and de-energize any associated equipment before performing fastener installation or removal in live assemblies. Follow applicable torque specifications from the equipment manufacturer or applicable ASME standards for 7/8-9 UNC alloy steel fasteners.