Value Collection D39154 Hex Cap Screw 5/8-11 X 3-1/4 Grade 8

Product Description

The VALUE COLLECTION D39154 is a Grade 8 steel hex head cap screw with a 5/8-11 UNC thread and a 3-1/4 inch length under head. It features partial threading and a zinc yellow dichromate finish that provides corrosion resistance in demanding environments. Manufactured to ASME B18.2.1 standards, this fastener delivers the high tensile strength required for structural, mechanical, and industrial bolted connections. Installers and maintenance technicians across the trades rely on Grade 8 hex cap screws for applications where fastener failure is not an option.

This fastener suits heavy-duty bolted assemblies in HVAC equipment mounting, mechanical room installations, equipment bases, and general industrial fabrication. The 5/8-11 coarse thread engages reliably in tapped steel components and standard hex nuts. Partial threading keeps the shank smooth through a clearance hole, making it well-suited for joints that require a bearing-surface grip rather than full thread engagement. This screw is sold individually, with a minimum order of 10 pieces.

Key Features

• Grade 8 steel construction provides high tensile and proof load strength
• Zinc yellow dichromate finish adds corrosion and wear resistance
• Partially threaded shank suits clearance-hole bolted joint applications
• 5/8-11 UNC thread for compatibility with standard coarse-thread hardware
• Manufactured to ASME B18.2.1 dimensional standards

Compatibility

Designed for use with standard 5/8-11 UNC hex nuts, flat washers, and lock washers in inch-series bolted assemblies. No specific equipment compatibility data was provided in the product input.

Installation Notes

Installation should be performed by a qualified mechanic or technician following applicable torque specifications from the joint designer or equipment manufacturer. De-energize and lock out any equipment before servicing fastened assemblies per applicable OSHA lockout/tagout procedures. Use a properly sized 15/16 inch hex socket or wrench to drive and seat this fastener. Do not exceed the rated proof load of a Grade 8 fastener when applying torque.