Gibraltar Z8962H Square Flat Washer 1 in Bolt 2 in

Product Description

The GIBRALTAR Z8962H is a square flat washer designed for use with 1-inch bolts. It features a 2-inch square bearing surface, a 1-1/16-inch inside diameter, and a 1/4-inch thickness. Manufactured from case hardened steel with a black oxide finish, this washer provides increased surface area for load distribution under bolt heads or nuts. The black oxide finish offers moderate corrosion resistance in light-duty environments. Licensed tradespeople and millwrights commonly use this washer in structural bolted connections where a standard round washer would not provide adequate bearing coverage.

This washer is suited for heavy-duty bolted assemblies in structural, industrial, and mechanical applications. The square profile is commonly specified where concentrated clamping loads must be spread across a larger surface area, such as in timber framing connections, machinery mounting, and steel fabrication. The case hardened steel construction handles high-clamp loads without deforming under torque. It is sold individually and can be stocked as a service replacement or used in new assembly work.

Key Features

• Square bearing surface at 2 inches provides greater load distribution than standard round washers
• Case hardened steel construction resists deformation under high clamping loads
• Black oxide finish adds mild corrosion resistance for indoor and sheltered applications
• 1-1/16-inch inside diameter fits 1-inch nominal bolts with standard clearance
• 1/4-inch thickness adds rigidity and prevents embedment into softer base materials

Compatibility

Designed for use with 1-inch nominal bolts in structural, mechanical, and industrial bolted connections requiring a square flat washer with a 2-inch bearing surface.

Installation Notes

Install using standard hand or power tools appropriate for the bolt size and joint type. Ensure mating surfaces are clean and free of debris before seating the washer. Follow applicable fastener torque specifications from the project engineer or relevant code, such as AISC or ASME standards, when used in structural applications. Power down or de-energize any adjacent systems before working in confined mechanical spaces.