Value Collection 011505BR Hex Socket Cap Screw 7/8-9 Unc

Product Description

The VALUE COLLECTION 011505BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Featuring a 7/8-9 UNC thread and a 3/4-inch hex drive, this fastener is partially threaded with a 3-1/4-inch length under head. Constructed from alloy steel with a black oxide coating, it delivers corrosion resistance and surface hardness suited to demanding service environments. It meets ASME/ANSI B18.3 and ASTM A574 standards, which govern dimensional tolerances and mechanical strength requirements for socket cap screws. Machinists, millwrights, and maintenance mechanics commonly install this type of fastener.

This screw is appropriate for use in heavy equipment assembly, machine bases, fixtures, and structural bolted connections where a recessed hex drive is preferred over an external hex head. The 7/8-9 UNC coarse thread engages quickly and resists stripping in through-hole or tapped applications. The black oxide finish makes it suitable for indoor industrial environments where moderate corrosion resistance is acceptable. It is sold individually and is a common replacement or stock fastener for shop and field maintenance.

Key Features

• 7/8-9 UNC coarse thread for fast engagement and reliable clamp load
• 3-1/4-inch length under head — partially threaded for shank grip in through-bolt applications
• 3/4-inch hex socket drive for use with standard hex keys or socket drive tools
• Alloy steel construction meets ASTM A574 high-strength socket screw requirements
• Black oxide coating provides mild corrosion resistance and reduces galling during installation
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for tapped or through-hole assemblies requiring a 7/8-9 UNC thread and a recessed hex drive configuration.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance mechanics using a 3/4-inch hex key or socket drive tool. Ensure the mating tapped hole or nut meets 7/8-9 UNC thread specifications before driving. Apply appropriate thread lubricant or anti-seize compound based on the service environment and torque to the assembly engineer's specified value. De-energize and lock out all equipment before accessing fastener locations on live machinery.