Gibraltar Z9204SS Extra Thick Flat Washer 1/2 in 18-8 Ss

Product Description

The GIBRALTAR Z9204SS is an extra thick flat washer designed for 1/2 inch screw applications. Manufactured from grade 18-8 stainless steel with a plain finish, it delivers corrosion resistance suitable for demanding installation environments. The washer measures 17/32 inches inside diameter, 1-1/8 inches outside diameter, and 3/16 inches thick. Its extra thickness provides increased load distribution and surface protection compared to standard flat washers. Hardness is rated Rockwell C36-C42, giving it solid resistance to deformation under load. It is appropriate for use in plumbing, HVAC, electrical, and general mechanical assemblies where a stainless fastener component is required.

This washer is suited for both residential and light commercial applications where corrosion resistance and added bearing surface area are priorities. Common installation scenarios include fastening pipe supports, equipment mounting brackets, and structural connections exposed to moisture or chemical environments. The plain finish makes it compatible with a wide range of fastener finishes and materials without galvanic-compatibility concerns in most stainless-to-stainless assemblies.

Key Features

• Extra thick 3/16 inch profile for increased load distribution and surface protection
• Grade 18-8 stainless steel construction for corrosion resistance in wet or harsh environments
• Sized for 1/2 inch screws with 17/32 inch inside diameter and 1-1/8 inch outside diameter
• Rockwell C36-C42 hardness rating resists deformation under sustained load
• Plain finish compatible with standard stainless and non-stainless fastener assemblies
• Inch-system dimensions for direct compatibility with standard US fastener hardware

Compatibility

Designed as a direct-fit flat washer for 1/2 inch screw fastener assemblies in inch-measurement systems. Suitable for use with standard 1/2 inch bolts, screws, and studs across plumbing, HVAC, electrical, and structural applications.

Installation Notes

Installation does not require specialized tools beyond standard hand or power fastening equipment. Ensure the mating fastener and substrate material are compatible with 18-8 stainless steel to avoid galvanic corrosion in dissimilar-metal assemblies. Power down or de-energize any equipment before accessing fastener points on electrical or mechanical systems. Follow applicable codes such as NEC or IPC for fastener requirements specific to your trade application.