Value Collection 581867BR Hex Socket Cap Screw 1-1/8-7 Unc

Product Description

The VALUE COLLECTION 581867BR is a hex socket cap screw designed for high-strength bolted connections in industrial, mechanical, and structural applications. Made from alloy steel with a black oxide finish, this fastener provides reliable clamping force and corrosion resistance in demanding environments. It features a 1-1/8-7 UNC thread size, a 3.5-inch length under head, and a 7/8-inch hex drive socket. The black oxide coating reduces surface friction and provides light corrosion protection. This screw meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for precision-spec installations where fastener grade matters.

This cap screw is used in a wide range of industrial and mechanical assembly applications, including machine frames, hydraulic equipment, tooling fixtures, and heavy-duty structural assemblies. The fully threaded shank provides maximum thread engagement across the full 3.5-inch length under head, which is especially useful when threading into deeper tapped holes or when a high clamping load is required. Machinists, millwrights, pipefitters, and maintenance technicians commonly install this type of fastener using a standard hex key or socket driver.

Key Features

• 1-1/8-7 UNC fully threaded alloy steel construction for high tensile strength
• 3.5-inch length under head for deep thread engagement
• 7/8-inch hex drive socket for high-torque installation
• Black oxide finish for light corrosion resistance and reduced galling
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard UNC hex socket cap screw for use in any application requiring a 1-1/8-7 thread form and a 3.5-inch length under head in alloy steel construction.

Installation Notes

Install using a correctly sized 7/8-inch hex key or socket to avoid rounding the drive recess. Ensure the mating tapped hole is properly cleaned and free of debris before installation. Always de-energize or lock out equipment before servicing fastened assemblies on machinery. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards for ASTM A574 alloy steel cap screws.