Value Collection HCI20871800G6 Hex Head Bolt 7/8-9 18 in

Product Description

The VALUE COLLECTION HCI20871800G6 is a partially threaded hex head bolt designed for structural and general fastening applications where corrosion resistance and reliable clamping strength are required. It features a 7/8-9 UNC thread size with an 18-inch length measured under the head. The bolt is manufactured from Grade 2 steel with a hot-dipped galvanized finish that provides a durable zinc coating for outdoor and moisture-exposed environments. Compliance with ASTM A307 makes it suitable for low-carbon steel fastener applications. Plumbers, structural trades, and general contractors commonly install this fastener in heavy assemblies requiring longer grip lengths.

This bolt is well suited for residential and light commercial construction, mechanical equipment mounting, structural framing connections, and utility installations where a long partially threaded fastener is needed. The hot-dipped galvanized finish makes it appropriate for exterior, underground-adjacent, or high-humidity environments. The partial threading allows for a smooth unthreaded shank in the grip area, reducing shear stress at the bearing surface in typical bolted joint applications.

Key Features

• 7/8-9 UNC thread provides coarse-pitch engagement suited for steel and heavy-material applications
• 18-inch length under head accommodates deep grip and long-reach fastening requirements
• Hot-dipped galvanized finish delivers enhanced corrosion protection compared to mechanical zinc plating
• Partial threading maintains a smooth shank in the grip zone to reduce shear load concentration
• ASTM A307 certified for use in standard-strength structural and mechanical bolting applications
• Grade 2 steel construction meets requirements for general-purpose low-carbon steel fasteners

Compatibility

Designed as a standard-duty replacement or new-installation fastener for applications requiring a 7/8-9 UNC partially threaded hex head bolt with an 18-inch length under head, conforming to ASTM A307 specifications.

Installation Notes

Installation should be performed by a qualified tradesperson using appropriately sized wrenches or impact tooling rated for 7/8-inch fasteners. Always verify that mating nuts and washers share compatible thread standards and material grades before assembly. Confirm that the joint design accounts for the partial thread length so that full thread engagement is achieved within the nut or tapped hole. Follow applicable building codes and structural specifications when using this fastener in load-bearing connections.