Value Collection D30170-6 Hex Head Cap Screw 1-8x6 in

Product Description

The VALUE COLLECTION D30170-6 is a 1-8 x 6 inch hex head cap screw manufactured from Grade 5 steel with a zinc-plated finish. It features partial threading along the shank and a standard UNC thread form, conforming to ASME B18.2.1 dimensional standards. This fastener is sized for heavy-duty mechanical assemblies where a larger-diameter, longer fastener is required to clamp thick structural members or flanged components. Maintenance technicians, millwrights, pipefitters, and general industrial mechanics install this type of fastener in equipment frames, machinery bases, pipe supports, and structural steel connections.

This hex head cap screw is suited for general industrial, commercial, and mechanical applications where inch-series UNC fasteners are specified. The partial threading leaves a smooth shank section near the head, which is preferred in applications requiring accurate bolt alignment through clearance holes or where shear load transfer is a design consideration. The zinc-plated finish provides a baseline level of corrosion resistance for indoor and light-exposure environments.

Key Features

• Grade 5 steel construction for higher tensile strength than standard Grade 2 fasteners
• Partially threaded shank for shear-load applications and accurate hole alignment
• Zinc-plated finish provides corrosion resistance in dry and light-moisture environments
• UNC (Unified National Coarse) thread form for broad nut and tapped-hole compatibility
• Conforms to ASME B18.2.1 for dimensional consistency and interchangeability
• 1-8 thread size and 6 inch length under head for heavy structural clamping applications

Compatibility

Designed for use with 1-8 UNC hex nuts, heavy hex nuts, and tapped holes conforming to ASME B18.2.1 and UNC thread standards in inch-series mechanical and structural assemblies.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson following applicable equipment manufacturer specifications and relevant standards such as ASME or AISC where structural fastening is involved. Always use a calibrated torque wrench and apply the correct torque value specified by the assembly design — do not estimate by feel on Grade 5 fasteners in structural applications. Inspect threads on both the fastener and mating nut or tapped hole for damage before installation. Do not mix metric hardware with this inch-series fastener.