Value Collection 581214BR Hex Socket Cap Screw 1-3/8-6 Unc

Product Description

The VALUE COLLECTION 581214BR is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Threaded to a 1-3/8-6 UNC specification, this fastener features a 20-inch length under the head and a 1-inch hex drive socket. Constructed from alloy steel with a black oxide coating, it delivers the tensile strength required for heavy-duty bolted connections. It is partially threaded, which helps maintain clamping force across thick material stacks. Machinists, millwrights, and maintenance technicians install this type of fastener where high torque and reliable joint integrity are required.

This screw is suited for use in large-scale industrial equipment, heavy machinery frames, structural steel assemblies, and fabrication projects requiring a coarse-thread, large-diameter fastener. Its partially threaded shank makes it appropriate for applications where the unthreaded portion must span a clearance hole before engaging a tapped bore. The black oxide finish provides moderate corrosion resistance in controlled environments. It is sold individually and is appropriate for shops and field crews sourcing single large fasteners for custom or repair work.

Key Features

• 1-3/8-6 UNC coarse thread form for high clamping load in large-diameter applications
• 20-inch length under head accommodates deep assemblies and thick material stacks
• 1-inch hex drive socket for use with standard hex keys or drive tooling
• Partially threaded shank maintains alignment through clearance holes
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide coating provides a uniform finish with moderate corrosion resistance

Compatibility

Designed as an OEM-style or replacement fastener for applications requiring a 1-3/8-6 UNC partially threaded hex socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574 specifications.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 1-inch hex key or driven socket tool. Always verify thread engagement depth and tapped-hole condition before torquing. Degrease or lubricate threads as required by your assembly specification, since lubrication affects torque-tension relationships significantly on large-diameter fasteners. Follow applicable ASME or facility torque standards for the joint class and material being fastened.