Value Collection 99239 Hex Head Cap Screw Grade 8 Steel

Product Description

The VALUE COLLECTION 99239 is a heavy-duty hex head cap screw designed for high-strength fastening applications. It carries a 1-1/8-7 UNC thread size with a 5-1/2 inch length under head and is partially threaded, making it well suited for clamping applications where the unthreaded shank provides a bearing surface. Manufactured from Grade 8 steel with no coating applied, this fastener meets ASME B18.2.1 dimensional standards. It is installed by mechanical contractors, millwrights, equipment fabricators, and maintenance technicians working on heavy machinery, structural assemblies, or industrial equipment requiring high-tensile fasteners.

This cap screw is appropriate for industrial and commercial applications where a coarse unified thread pitch and high-strength Grade 8 material are specified. Partial threading allows the shank to pass through clearance holes cleanly before engaging the nut or tapped bore. It is commonly used in structural steel connections, heavy equipment mounting, and machinery frames where tensile and shear loads demand Grade 8 performance. This item is sold in a package quantity of two.

Key Features

• Grade 8 steel construction for high tensile and proof load ratings
• 1-1/8-7 UNC coarse thread for reliable engagement in heavy-duty assemblies
• 5-1/2 inch length under head accommodates thick material stacks
• Partially threaded shank provides a clean bearing surface through clearance holes
• Uncoated finish for bare steel applications or field-applied coating
• Conforms to ASME B18.2.1 dimensional standard

Compatibility

Designed as a standard UNC hex head cap screw for use with 1-1/8-7 threaded nuts, tapped holes, or heavy hex nuts conforming to Inch series fastener specifications.

Installation Notes

Installation should be performed by a qualified mechanic or technician using an appropriately sized hex socket or open-end wrench rated for the fastener size. Torque to the value specified by the equipment manufacturer or applicable structural standard for Grade 8 fasteners of this diameter. Inspect threads for damage before installation and ensure mating threads are clean and free of debris. Always follow applicable codes and equipment OEM guidelines when replacing or installing structural fasteners.