Gibraltar Z9099BR Flat Washer 1/2 in Brass Plain

Product Description

The GIBRALTAR Z9099BR is a standard flat washer designed for use with 1/2-inch screws and fasteners. Machined from solid brass with a plain, uncoated finish, this washer distributes load evenly across a fastened joint, reducing surface damage and preventing fastener pull-through. It measures 17/32 inches inside diameter, 1-1/8 inches outside diameter, and 1/8 inch thick. The brass construction offers natural corrosion resistance, making it a reliable choice in environments where steel washers would be prone to rust or galvanic reactions with brass or copper hardware.

This flat washer is commonly used in plumbing, electrical, and general mechanical assembly work across residential and light commercial applications. It is suited for use wherever a 1/2-inch fastener requires a bearing surface — including fixture mounting, pipe flange connections, panel work, and general hardware assembly. The plain finish is compatible with exposed and semi-exposed installations where an uncoated brass surface is acceptable.

Key Features

• Brass construction provides inherent corrosion resistance without a coating
• Plain finish — no plating or treatment that could flake or delaminate over time
• Standard washer geometry: 17/32 inches ID, 1-1/8 inches OD, 1/8 inch thick
• Fits 1/2-inch screw or bolt fasteners
• Sold individually — single-piece quantity per package

Compatibility

Designed as an OEM-style standard flat washer for use with 1/2-inch screw and bolt fasteners in brass-compatible fastener assemblies.

Installation Notes

Standard flat washers are installed by plumbers, electricians, and general mechanical trades as part of fastener assemblies. Always seat the washer flush against the mating surface before torquing the fastener. Ensure the fastener and washer materials are compatible to avoid galvanic corrosion, particularly when mixing metals. No special tools are required for installation.