Gibraltar Z9276 Structural Flat Washer 5/8 in Alloy Steel

Product Description

The GIBRALTAR Z9276 is a structural flat washer designed for 5/8-inch screw applications in heavy-duty fastening assemblies. Manufactured from alloy steel with a zinc yellow dichromate finish, this washer provides corrosion resistance and load distribution across structural connections. It measures 21/32 inches inside diameter, 1-5/16 inches outside diameter, and 7/32 inches thick. Hardness is rated Rockwell C43-C49, meeting the demands of structural bolted joints. Installers in construction, mechanical, and trade service applications rely on this washer to protect mating surfaces and maintain clamp load integrity under high-stress conditions.

This washer is suited for structural bolting in residential and commercial construction, steel framing, equipment mounting, and mechanical assembly work. It is sized for 5/8-inch fasteners and fits standard structural bolt patterns. The zinc yellow dichromate coating makes it appropriate for applications where mild corrosion resistance is required alongside high hardness. Trade professionals including ironworkers, millwrights, and mechanical contractors commonly use this washer in structural and equipment-mounting scenarios.

Key Features

• Alloy steel construction rated Rockwell C43-C49 hardness for structural-grade performance
• Zinc yellow dichromate finish for corrosion resistance
• 21/32-inch inside diameter fits 5/8-inch fasteners with standard clearance
• 1-5/16-inch outside diameter provides broad load-bearing surface
• 7/32-inch thickness supports high-clamp-load structural joints

Compatibility

Designed as an OEM-style structural flat washer for use with 5/8-inch screws and bolts in standard structural fastening applications.

Installation Notes

Installation is performed by qualified tradespeople following applicable structural or mechanical assembly codes. Always ensure the fastener and washer are free of debris before assembly to maintain proper seating and clamp load. Consult the applicable structural specification or engineer of record for torque and installation requirements specific to the joint design. Do not substitute this washer in applications requiring a different hardness grade or dimensional standard without verifying compatibility.