Gibraltar Z9207SS Extra Thick Flat Washer 7/8 in 18-8 Ss

Product Description

The GIBRALTAR Z9207SS is an extra thick flat washer designed for 7/8 inch screw sizes, manufactured from Grade 18-8 stainless steel with a plain finish. This washer provides a larger bearing surface and increased load distribution compared to standard flat washers, making it suitable for applications where fastener pull-through or surface damage is a concern. The 18-8 stainless steel construction offers solid corrosion resistance in wet, outdoor, and mildly chemical environments. With a Rockwell C36-C42 hardness rating, it delivers reliable performance under mechanical load. Plumbers, electricians, HVAC technicians, and general contractors commonly use this type of hardware in equipment mounting, pipe support, and structural fastening applications.

This washer is appropriate for use in residential and light commercial trade applications where a 7/8 inch fastener requires additional clamping surface area or where standard washer thickness is insufficient. It is suited for use in mechanical rooms, rooftop equipment mounting, pipe hangers, duct support systems, and similar installations where corrosion resistance is a priority. The plain finish makes it compatible with a wide range of fastener finishes without galvanic concern in typical stainless-to-stainless assemblies.

Key Features

• Extra thick profile at 0.25 inches provides greater load distribution than standard flat washers
• Grade 18-8 stainless steel construction for corrosion resistance in wet and outdoor environments
• Inside diameter of 0.9063 inches fits 7/8 inch screw sizes
• Outside diameter of 1.75 inches delivers a wide bearing surface
• Rockwell C36-C42 hardness rating for reliable mechanical performance
• Plain finish with no additional coating, suitable for general trade fastening use

Compatibility

Designed for use with 7/8 inch screw fasteners in standard inch-measurement fastening applications requiring an extra thick flat washer profile.

Installation Notes

Installation requires no special tools beyond the appropriate wrench or socket for the mating fastener. Power down or de-energize any equipment before servicing fastened assemblies in electrical or HVAC applications. Ensure mating fasteners are also stainless steel or a compatible alloy to minimize galvanic corrosion risk. Follow applicable mechanical, electrical, or plumbing codes for the specific installation type.