Description
This diffuser is a direct-fit replacement for ASM part 4402-G, used in 300 Spray Gun, 400 Spray Gun, Graco 300 Spray Gun. It installs in the original position with no modification.
Common reasons this diffuser is replaced:
- Wear or damage found during a scheduled rebuild
- Loss of pressure or an inconsistent spray pattern
- Normal wear from abrasive or high-solids coatings
Manufactured to OEM-equivalent dimensions for proper fit and performance. Compatible equipment models are listed in the Compatible Equipment section below, where available.









