A spray gun’s finish quality depends on stable pressure and proper sealing—especially around the front-end assemblies. The AirCraft SG AB17G-15 Fluid Cap Washer is a replacement sealing washer designed for the AB17G spray gun, helping the fluid cap seat correctly and maintain a tight seal.

If the washer is worn, flattened or damaged, you can end up with seepage, air leaks, inconsistent atomisation or messy buildup around the cap. Replacing this washer is a simple, low-cost service step that helps keep your AB17G clean, leak-free and spraying evenly.