Gibraltar Z8958G Square Flat Washer 3/4 in Bolt Galvanized

Product Description

The GIBRALTAR Z8958G is a square flat washer designed for use with 3/4 inch bolts in heavy-duty fastening applications. Constructed from steel with a hot-dipped galvanized finish, this washer provides corrosion resistance suited to outdoor, industrial, and mechanical installations. It measures 2 inches square with a 13/16 inch inside diameter and a 1/4 inch thickness. The square profile distributes load over a broader surface area than a standard round washer, reducing pull-through and surface damage on softer substrates. Plumbers, HVAC technicians, electricians, and general tradespeople use this type of washer when securing equipment, pipe hangers, structural brackets, or conduit supports.

This washer is commonly used in residential and commercial construction, mechanical rooms, rooftop equipment installations, and utility spaces where moisture exposure makes corrosion resistance a priority. The hot-dipped galvanized coating offers durability in wet or outdoor conditions. At 0.23 pounds per unit, it is lightweight enough for single-hand placement during installation. Typical applications include securing structural members, anchoring HVAC equipment bases, fastening pipe support brackets, and general-purpose bolted connections requiring a wider bearing surface.

Key Features

• Hot-dipped galvanized steel finish for corrosion resistance in wet and outdoor environments
• 2 inch square profile provides greater load distribution than standard round washers
• 13/16 inch inside diameter sized for 3/4 inch bolts
• 1/4 inch thickness adds rigidity and reduces deformation under load
• Steel construction suitable for structural and mechanical fastening applications

Compatibility

Designed for use with 3/4 inch bolts as an OEM-style or replacement square flat washer in general mechanical, plumbing, HVAC, and electrical trade fastening applications.

Installation Notes

Install with standard hand tools appropriate to the bolt size. Ensure the bolt threads and mating nut are compatible with 3/4 inch fastener specifications before assembly. In corrosive or outdoor environments, pair with galvanized or stainless hardware throughout the assembly to avoid galvanic incompatibility. Torque fasteners per project engineering specifications or applicable building code requirements.