Value Collection MP39147 Hex Head Cap Screw 5/8-11 X 1-1/4 in

Product Description

The VALUE COLLECTION MP39147 is a fully threaded hex head cap screw designed for high-strength fastening applications across industrial, mechanical, and structural assemblies. Manufactured to Grade 8 steel specification, this fastener delivers a significantly higher tensile and proof load rating compared to lower-grade hardware, making it suitable for joints subjected to heavy loads and vibration. The 5/8-11 thread designation follows Unified National Coarse (UNC) standards, and the zinc yellow dichromate finish provides corrosion resistance while serving as a visual indicator of the Grade 8 classification. Tradespeople, millwrights, and mechanical contractors rely on this type of fastener for equipment mounting, structural connections, and machinery assembly.

This cap screw is used wherever a high-strength inch-series fastener is required. Typical applications include industrial equipment frames, heavy-duty machinery, structural steel connections, and mechanical assemblies where torque and clamp load requirements demand Grade 8 performance. The 1-1/4 inch length under head and full-thread configuration make it well suited for through-bolt applications in thinner stock or where maximum thread engagement is needed throughout the joint. It conforms to ASME B18.2.1, the standard governing inch hex cap screws in North American applications.

Key Features

• Grade 8 steel construction for high tensile strength and resistance to shear and fatigue loads
• Fully threaded body for maximum thread engagement in through-bolt and shallow-clearance applications
• 5/8-11 UNC thread pattern conforming to Unified National Coarse standards
• Zinc yellow dichromate finish provides corrosion resistance and serves as a Grade 8 visual identifier
• Meets ASME B18.2.1 dimensional and manufacturing standards
• Sold in packages of 10 with a minimum order quantity of 1

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 5/8-11 UNC Grade 8 fastener per ASME B18.2.1.

Installation Notes

Installation of Grade 8 fasteners is typically performed by mechanical contractors, millwrights, or maintenance technicians using a calibrated torque wrench to achieve proper clamp load. Always use the correct hex socket or open-end wrench sized for a 5/8-11 fastener head. Verify mating thread condition and clean threads of debris before assembly. Do not reuse fasteners that have been torqued to yield, as material integrity may be compromised.