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Graco 4402-G Diffuser T.C. Seat/G Thread

The Graco 4402-G Diffuser T.C. Seat/G Thread is a precision internal spray gun component designed to regulate fluid flow and safely disperse pressure for consistent spray performance.

  • Designed for Graco 300 & 400 series airless spray guns
  • Tungsten carbide seat for durability under high pressure
  • G-thread design for secure and accurate fit
  • Helps maintain smooth spray pattern and gun efficiency

Retail Price: $65
You save: $4.94 (7.60%)
Our Price: $60.06
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Compatible Machines

  • Graco 300 Series Airless Spray Guns
  • Graco 400 Series Airless Spray Guns

Product Overview

The Graco 4402-G Diffuser T.C. Seat/G Thread is a precision-engineered internal component designed for use in Graco airless spray guns. This diffuser plays a critical role in controlling and directing fluid flow through the spray gun, ensuring consistent spray performance and safe pressure dispersion.

Manufactured to Graco’s exact specifications, this diffuser features a durable tungsten carbide (T.C.) seat and a G-thread design for secure installation within compatible spray guns. It is commonly replaced during routine maintenance or when restoring proper spray pattern control.

Key Features & Specifications

Part Number 4402-G
Component Type Diffuser with T.C. Seat
Thread Type G Thread
Material Tungsten Carbide Seat with Metal Body
Application Airless Spray Gun Internal Fluid Control

Usage & Benefits

  • Helps regulate and diffuse high-pressure fluid flow
  • Supports consistent spray pattern and gun performance
  • Designed for long service life under high-pressure conditions
  • Direct replacement part for worn or damaged diffusers

Frequently Asked Questions

This diffuser helps control and direct the flow of coating material inside the spray gun while safely dispersing pressure, contributing to smooth operation and reliable spray performance.

Replacement is recommended if you experience inconsistent spray patterns, pressure issues, or visible wear on the diffuser during routine gun maintenance.

No. This diffuser is designed specifically for Graco spray guns that use a G-thread diffuser configuration, most commonly found in the 300 and 400 series guns.

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