Value Collection KP44125 Hex Head Cap Screw 5/8-11 X 5-1/2 in Grade 8

Product Description

The VALUE COLLECTION KP44125 is a partially threaded hex head cap screw sized 5/8-11 x 5-1/2 inches, manufactured from Grade 8 steel with a zinc-plated finish. Grade 8 steel delivers high tensile strength suited for demanding structural and mechanical fastening applications. The zinc plating provides baseline corrosion resistance for general service environments. The UNC thread form follows the 5/8-11 standard, and the screw meets ASTM A354 BD specification, confirming minimum proof load and tensile strength requirements for this grade class. Installed with a standard hex wrench or socket, this fastener is a workhorse choice for heavy-duty bolted connections in mechanical, structural, and equipment assembly work.

This hex head cap screw is used in industrial, commercial, and trade applications where high-strength fastening is required. Typical uses include mounting heavy mechanical equipment, structural steel connections, HVAC equipment frames, pump and motor bases, and similar bolted assemblies that require a Grade 8 rated fastener. The partial thread configuration is particularly suited for joints with a grip length that benefits from a smooth shank section to reduce stress concentration. Sold in packages of 10, the KP44125 is appropriate for both single-task service calls and stocking in a trade van or shop.

Key Features

• Grade 8 steel construction meets ASTM A354 BD specification for high-strength fastener applications
• 5/8-11 UNC thread size with 5-1/2 inch length under head
• Partially threaded shank reduces stress concentration at the grip zone
• Zinc-plated finish provides corrosion resistance for general service environments
• Hex head drive accepts standard hex sockets and open-end wrenches
• Packaged in quantities of 10 per package

Compatibility

Designed as a high-strength replacement or service fastener for any bolted assembly specifying a 5/8-11 UNC partially threaded hex head cap screw rated to Grade 8 or ASTM A354 BD.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with proper fastener torque practices for Grade 8 hardware. Always de-energize and de-pressurize equipment before disassembling or reassembling bolted joints. Use the correct hex socket size for 5/8-inch hex head fasteners to avoid rounding the drive surface. Follow the equipment manufacturer's torque specifications and applicable codes for the assembly being serviced.