Value Collection HCI81750750 Hex Head Cap Screw Grade 8

Product Description

The Value Collection HCI81750750 is a heavy-duty hex head cap screw designed for high-strength fastening applications in industrial, construction, and mechanical assembly environments. It features a 1-3/4-5 UNC thread size with a 7-1/2-inch length under the head and is manufactured from Grade 8 steel with a bright uncoated finish. The partial threading design concentrates clamping force at the joint and reduces thread engagement in the shank area, making it suitable for applications where shear strength and precise clamping are required. Machinists, millwrights, and structural mechanics typically install fasteners of this type.

This fastener is used in heavy industrial machinery, structural steel assemblies, and high-load mechanical connections where a Grade 8 tensile rating is specified. The coarse UNC thread pattern is standard for general-purpose steel fastening and offers reliable engagement across a wide range of compatible nuts and tapped holes. The bright uncoated finish is appropriate for indoor or controlled-environment installations where corrosion exposure is minimal. The large 1-3/4-inch diameter makes this screw suited for heavy-equipment frames, press tooling, and similar high-load structural connections.

Key Features

• Grade 8 steel construction for high tensile and proof load requirements
• 1-3/4-5 UNC coarse thread standard for broad compatibility with standard hardware
• Partially threaded shank provides improved shear strength and precise joint clamping
• Bright uncoated finish suitable for dry or controlled indoor environments
• Length under head measures 7-1/2 inches for deep-reach fastening applications

Compatibility

Designed as a standard UNC-thread hex head cap screw compatible with 1-3/4-5 UNC tapped holes and standard heavy hex nuts meeting inch-series fastener specifications.

Installation Notes

Installation of large-diameter Grade 8 fasteners typically requires a heavy-duty torque wrench calibrated for the specified clamp load. Always verify that the mating nut or tapped hole carries the same Grade 8 or equivalent rating to avoid thread stripping. Power down or de-energize any equipment before fastener replacement or structural disassembly. Follow applicable ASME or AISC torque and joint-design guidelines for the specific assembly.