Value Collection C89513 Hex Cap Screw 5/16-18 X 6 in Grade 8 25pk

Product Description

The VALUE COLLECTION C89513 is a Grade 8 steel hex head cap screw sized 5/16-18 x 6 inches, designed for high-strength fastening applications in demanding industrial, mechanical, and structural assemblies. Partially threaded along the shank, this fastener delivers the clamping force needed in critical joints without sacrificing shank integrity. The zinc yellow dichromate finish provides corrosion resistance suitable for general-purpose indoor and light outdoor use. Conforming to ASME B18.2.1, this screw meets established dimensional and performance standards recognized across manufacturing, maintenance, and fabrication trades. Each package contains 25 screws.

This cap screw is well suited for heavy-duty bolted connections in machinery, equipment frames, structural brackets, and fabricated assemblies where Grade 8 strength is specified. The UNC thread form (5/16-18) is compatible with standard inch-system nuts, threaded plate inserts, and tapped holes of the same designation. Maintenance mechanics, millwrights, and fabricators working in industrial plants, commercial construction, and OEM equipment repair will encounter this fastener size and grade routinely. The 6-inch length under head accommodates thick material stacks or long-reach bolting configurations.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 5/16-18 UNC thread form compatible with standard inch-system hardware
• 6-inch length under head for long-reach and thick-material applications
• Partially threaded shank preserves shear strength in bolted joints
• Zinc yellow dichromate finish for corrosion resistance in general-purpose environments
• Conforms to ASME B18.2.1 dimensional standards

Compatibility

Designed for use with standard 5/16-18 UNC inch-series nuts, washers, and tapped components. Verify thread engagement depth and material stack thickness before installation to ensure proper fit.

Installation Notes

Install using a properly sized hex wrench, socket, or open-end wrench sized for a 5/16-inch hex head. Always verify that mating threads are clean and free of debris before driving the fastener. Apply a calibrated torque wrench to achieve the specified clamp load for Grade 8 fasteners per your applicable engineering or maintenance standard. Inspect threads for damage prior to reuse; Grade 8 fasteners that have been overtorqued or stretched should be replaced.