Value Collection 451130BR Hex Head Cap Screw 5/8-18 X 6-1/2 in

Product Description

The VALUE COLLECTION 451130BR is a Grade 8 steel hex head cap screw with a 5/8-18 UNF thread and a 6-1/2 inch length under head. It is partially threaded and left uncoated (bright finish), conforming to ASME B18.2.1 dimensional standards. Grade 8 steel provides high tensile strength suitable for demanding structural and mechanical fastening applications. This screw is installed by machinists, millwrights, maintenance technicians, and general contractors wherever a high-strength inch-series fastener is required.

This cap screw is used in heavy equipment assembly, structural steel connections, machinery mounting, and industrial maintenance applications. The 5/8-18 UNF thread designation indicates a fine-thread series, which offers better thread engagement and resistance to loosening under vibration compared to coarse-thread alternatives. The partial threading leaves a smooth shank section near the head, which is common in applications requiring shear load resistance or precise hole alignment.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/8-18 UNF fine-thread series for improved vibration resistance and thread engagement
• Partially threaded shank provides shear resistance and alignment in close-tolerance holes
• Bright/uncoated finish conforms to ASME B18.2.1 dimensional standard
• 5/16 inch hex key size for installation with standard hex tools
• Sold individually — no minimum bundle required

Compatibility

Designed for use in inch-series fastening applications requiring a 5/8-18 UNF hex head cap screw meeting ASME B18.2.1 specifications. Suitable as a direct replacement or new-install fastener in structural, mechanical, and industrial assemblies using Grade 8 hardware.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician familiar with high-strength fastener procedures. Always verify mating thread condition and hole depth before installation. Apply torque according to the published Grade 8 torque specification table for 5/8-18 fasteners as specified by the equipment manufacturer or applicable engineering standard. Do not use an uncoated fastener in environments requiring corrosion resistance without an appropriate surface treatment or coating.