Gibraltar Z9282 Structural Flat Washer 1-3/8 in Alloy Steel

Product Description

The GIBRALTAR Z9282 is a structural flat washer designed for high-load bolted connections requiring a hardened bearing surface. Built from alloy steel with a zinc yellow dichromate finish, this washer meets the demands of structural fastening applications where standard washers lack the hardness and load distribution needed. It carries a Rockwell hardness rating of C43 to C49, making it appropriate for heavy-duty fastener assemblies. The inside diameter measures 1.4375 inches, the outside diameter measures 2.75 inches, and the thickness is 0.25 inches. Licensed tradespeople and structural erectors working with 1-3/8 inch fasteners will find this washer fits standard structural bolt configurations.

This washer is intended for use with 1-3/8 inch screw or bolt sizes in structural steel connections, heavy timber framing, and industrial equipment anchoring. It is suited to both commercial and light industrial installations where ASTM or specification-grade fastener assemblies are specified. The zinc yellow dichromate finish provides a baseline level of corrosion resistance for interior or protected exterior applications. Ironworkers, millwrights, and construction mechanics routinely use structural washers of this type when assembling moment connections or anchor bolt installations.

Key Features

• Alloy steel construction with Rockwell C43-C49 hardness for high-load applications
• Zinc yellow dichromate finish for corrosion resistance in protected environments
• Inside diameter of 1.4375 inches fits 1-3/8 inch fasteners
• Outside diameter of 2.75 inches provides broad load distribution
• Thickness of 0.25 inches meets standard structural washer geometry
• Inch measurement system, compatible with standard US fastener specifications

Compatibility

Designed as an OEM-style structural flat washer for use with 1-3/8 inch bolts and screws in structural steel and heavy-duty fastener assemblies.

Installation Notes

Installation of structural washers is typically performed by ironworkers, millwrights, or licensed contractors working under applicable building codes and structural specifications. Ensure all fastener components are rated for the same load class before assembly. Torque fasteners according to the project engineer's specifications or applicable code requirements. Inspect the washer seating surface for burrs or debris before tightening to ensure full bearing contact.