Value Collection D39161 Hex Head Cap Screw 5/8-11 X 6 in Grade 8

Product Description

The VALUE COLLECTION D39161 is a Grade 8 steel hex head cap screw designed for high-strength fastening applications where dependable clamping force is critical. It features a 5/8-11 UNC thread with a 6-inch length under head and is partially threaded, making it well suited for applications requiring an unthreaded grip zone beneath the head. The Yellow Zinc Dichromate finish provides corrosion resistance and meets ASME B18.2.1 dimensional standards. This fastener is installed by mechanical and maintenance tradespeople in structural, industrial, and heavy equipment assembly work.

This cap screw is appropriate for high-load bolted connections in industrial machinery, structural steel assembly, and heavy fabrication. The partially threaded shank engages the grip zone without thread interference, which is standard practice in precision-fit assemblies and shear-load joints. The UNC thread form is compatible with standard inch-series tapped holes and hex nuts across a wide range of industrial and trade applications.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 5/8-11 UNC thread — standard inch coarse thread series
• 6-inch length under head with partial threading and unthreaded grip zone
• Yellow Zinc Dichromate finish provides corrosion resistance
• Conforms to ASME B18.2.1 dimensional standard

Compatibility

Designed as a standard-dimension replacement or new-installation fastener for any 5/8-11 UNC tapped hole or nut requiring a Grade 8 hex head cap screw per ASME B18.2.1.

Installation Notes

Installation is performed by mechanical, industrial maintenance, or structural tradespeople using standard 15/16-inch hex tooling for 5/8-inch fasteners. Always torque to the specification required by the joint design and applicable engineering or code standards — do not estimate torque by feel on Grade 8 hardware. Inspect threads and mating surfaces for damage or contamination before assembly. Follow applicable AISC, OSHA, or equipment manufacturer guidelines for structural or safety-critical bolted joints.