Corrosion-Resistant Systems · 3/8-Inch Stainless Hardware
Install 3/8-inch stainless flat washers
Stainless flat washers — Duct flange or support bracket
Hardware guidanceMatch washer alloy and hardness to bolt/nut and flange material.
Anti-seize / gallingKeep anti-seize on threads, not between a sealing washer and gasketed face unless approved.
How to install it
- 1
Place washer flat under bolt head and/or nut as detailed
- 2
ensure it does not bridge a burr or edge
- 3
use larger OD washer only when approved.
Quality check
- Washer seats flat and distributes load without cupping.
Stop and verify
Stop if washer deforms or cuts into soft aluminum.