Value Collection 581798BR Hex Socket Cap Screw 7/8-14 Unf

Product Description

The VALUE COLLECTION 581798BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Built from alloy steel with a black oxide finish, this fastener delivers corrosion resistance and a clean appearance suited to demanding environments. The screw features a 7/8-14 UNF thread size, a 6-inch length under head, and accepts a 3/4-inch hex drive. Partial threading along the shank provides precise clamping force and is standard for this length and diameter class. Machinists, millwrights, and maintenance technicians are the primary installers of fasteners in this category.

This socket cap screw is used in heavy equipment assembly, fixture fabrication, tooling setups, and general industrial machinery where a high-strength, recessed-drive fastener is required. The fine 14 TPI thread pitch makes it well suited for applications requiring precise torque control or use in thin-walled or tapped-hole assemblies where thread engagement accuracy matters. Its black oxide finish makes it a common choice in applications where surface reflectivity must be minimized or where light oil retention is beneficial for corrosion resistance.

Key Features

• 7/8-14 UNF fine-thread for precise thread engagement and torque control
• 6-inch length under head with partial threading for optimal clamping
• Alloy steel construction for high tensile strength in demanding assemblies
• Black oxide finish provides mild corrosion resistance and low reflectivity
• 3/4-inch hex socket drive compatible with standard hex keys and socket drives
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard hex socket cap screw for use in tapped holes or with nuts conforming to 7/8-14 UNF thread specifications in industrial and mechanical assemblies.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a calibrated torque wrench and the appropriate 3/4-inch hex key or socket driver. Ensure mating threads are clean and free of debris before installation. Do not exceed the rated torque for the thread size and material grade. Always de-energize and lock out equipment before servicing fasteners in live machinery per OSHA lockout/tagout requirements.