Gibraltar Z9252 Jumbo Flat Washer Alloy Steel Black Oxide

Product Description

The GIBRALTAR Z9252 is a jumbo flat washer designed for use with 1-1/2 inch screws and heavy-duty fastening applications. Manufactured from alloy steel with a black oxide finish, this washer provides a larger-than-standard bearing surface to distribute load and reduce pull-through on softer substrates. The black oxide coating offers moderate corrosion resistance and reduces surface glare in finished assemblies. With an inside diameter of 1.625 inches, an outside diameter of 3 inches, and a thickness of 0.25 inches, this washer fits standard 1-1/2 inch fasteners while offering substantial clamping area. Installers working in structural, mechanical, or industrial applications will find this washer suited to demanding load-distribution requirements.

This jumbo flat washer is appropriate for structural connections, equipment mounting, and general mechanical assemblies where standard-size washers do not provide adequate bearing surface. The oversized OD is particularly useful when fastening through sheet metal, wood framing, rubber gaskets, or other compressible materials. It is commonly installed by millwrights, ironworkers, pipefitters, and general contractors working on industrial and commercial projects.

Key Features

• Jumbo profile with 3 inch OD provides extended load-bearing surface compared to standard washers
• Alloy steel construction delivers high tensile strength for demanding fastening applications
• Black oxide finish offers moderate corrosion resistance and a low-glare surface
• 1.625 inch inside diameter fits 1-1/2 inch screw sizes
• 0.25 inch thickness adds rigidity and reduces deformation under clamp load
• Inch measurement system for direct compatibility with standard SAE fasteners

Compatibility

Designed as an OEM-style replacement or direct-fit washer for 1-1/2 inch screw and bolt applications requiring a jumbo flat washer profile in inch-dimensioned fastener assemblies.

Installation Notes

Installation requires no specialized tools beyond standard wrenches or impact drivers suited to the mating fastener size. Power down or de-energize any associated equipment before servicing mechanical assemblies. Do not substitute this washer in applications requiring hardened or SAE-grade-specific bearing surfaces without verifying material compatibility. Follow applicable mechanical and structural codes for the project type.