Value Collection 99153 Hex Head Cap Screw 5/8-11x3 Grade 8 25pk

Product Description

The VALUE COLLECTION 99153 is a 5/8-11 hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assembly work. Measuring 3 inches under the head with a coarse UNC thread pattern, this fastener is manufactured to Grade 8 steel specifications, making it suitable for demanding load-bearing connections. The partially threaded shank provides a consistent bearing surface in bolted joint assemblies. Sold in a package of 25, this screw is a standard choice for machinists, millwrights, maintenance technicians, and contractors working with inch-series fasteners.

This screw is used in a wide range of commercial and industrial applications where high tensile strength and shear resistance are required. Typical installations include machinery mounting, structural steel connections, heavy equipment assembly, and general mechanical maintenance. The uncoated finish is appropriate for indoor or protected environments and for applications where a coating-free surface is required for further treatment or specific material compatibility.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-11 UNC coarse thread for reliable engagement in standard inch-series tapped holes
• 3-inch length under head for deep fastening or thick-stack assemblies
• Partially threaded shank provides a smooth bearing surface in the bolt grip zone
• Uncoated finish suitable for applications requiring bare steel or post-installation coating
• Conforms to ASME B18.2.1 dimensional standards

Compatibility

Designed as an OEM-style replacement or standard-service fastener for any application requiring a 5/8-11 UNC hex head cap screw in Grade 8 steel per ASME B18.2.1.

Installation Notes

Installation is performed by millwrights, maintenance mechanics, or any qualified tradesperson working with inch-series fasteners. Always ensure the mating tapped hole or nut is rated for Grade 8 or higher to avoid joint failure. De-energize and lock out all machinery before fastener removal or installation in live equipment. Use calibrated torque equipment appropriate to the fastener size and joint requirements.