Value Collection 99147 Hex Cap Screw 5/8-11 X 1.5 in Grade 8 25pk

Product Description

The VALUE COLLECTION 99147 is a fully threaded hex head cap screw designed for high-strength bolted connections in industrial, mechanical, and structural applications. Manufactured from Grade 8 steel with no finish coating applied, this fastener meets ASME B18.2.1 dimensional standards. The 5/8-11 thread designation indicates a 5/8-inch nominal diameter with 11 threads per inch (UNC), and the 1.5-inch length is measured under the head. This package contains 25 screws, making it suitable for both shop stock replenishment and job-site use by millwrights, maintenance technicians, and general contractors.

This screw is suited for heavy-duty fastening tasks where a higher proof load and tensile strength are required. Grade 8 fasteners are commonly specified in automotive assemblies, heavy equipment, structural steel connections, and machinery mounting applications. The uncoated finish means no additional galvanic or chemical compatibility concerns from a surface treatment, though the bare steel surface should be considered in corrosive environments. The UNC thread form is compatible with standard inch-system nuts and tapped holes.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-11 UNC thread for compatibility with standard inch-system hardware
• Fully threaded along the 1.5-inch shank length under head
• Uncoated finish — no plating or chemical treatment applied
• Meets ASME B18.2.1 dimensional standard
• Sold in a 25-piece package for bench stock or project use

Compatibility

Designed as a standard inch-series hex head cap screw compatible with 5/8-11 UNC nuts, threaded inserts, and tapped holes conforming to ASME B18.2.1 specifications.

Installation Notes

Installation is performed by millwrights, maintenance mechanics, or general tradespeople using standard hex wrenches or impact tools sized for the appropriate hex drive. Always verify mating thread class and hole depth before installation. Consult applicable torque specifications from the joint design engineer or equipment OEM, as this fastener data does not include a torque value. In structural applications, installation must comply with relevant building codes and engineering specifications.