Gibraltar Z9272 Structural Flat Washer 3/8 in Alloy Steel

Product Description

The GIBRALTAR Z9272 is a structural flat washer designed for 3/8-inch fastener applications requiring a hardened load-bearing component. Manufactured from alloy steel with a zinc yellow dichromate finish, this washer provides corrosion resistance and surface protection in demanding conditions. It carries a Rockwell hardness rating of C43 to C49, making it appropriate for structural bolted connections where load distribution and joint integrity are critical. Licensed tradespeople, structural contractors, and maintenance professionals install this washer in bolted assemblies that call for a hardened, finish-coated washer per industry standards.

This washer is suited for use in structural steel connections, heavy mechanical assemblies, and industrial fastening applications using 3/8-inch screws or bolts. The yellow dichromate finish offers mild corrosion resistance for indoor and semi-exposed environments. It is packaged individually but carries a minimum order quantity of 5 units, making it practical for both single-job use and small-batch procurement on commercial or industrial service calls.

Key Features

• Alloy steel construction with Rockwell C43-C49 hardness for structural load distribution
• Zinc yellow dichromate finish for corrosion resistance and surface identification
• 13/32-inch inside diameter fits 3/8-inch fasteners with standard clearance
• 13/16-inch outside diameter provides broad bearing surface for structural connections
• 1/8-inch thickness meets typical structural washer dimensional requirements
• Inch measurement system; compatible with standard imperial fastener specifications

Compatibility

Designed as an OEM-style structural flat washer for use with 3/8-inch screws and bolts in imperial-dimensioned structural and mechanical assemblies.

Installation Notes

Installation is performed by qualified tradespeople, structural ironworkers, or maintenance mechanics working on bolted structural connections. Confirm the fastener diameter and joint specification before selecting washer size and hardness grade. Follow applicable building codes and fastener manufacturer torque guidelines for the specific bolt grade and connection type. Inspect the washer seating surface for debris or burrs before assembly to ensure proper load distribution.