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Graco 556404 Fitting, 3/8 X 1/4 Nptf Hex Red

Hex reducing fitting adapts 3/8-inch and 1/4-inch NPTF threaded connections for dependable fluid or air transfer in compatible Graco equipment.

  • 3/8" x 1/4" NPTF reducing threads
  • Hex body enables quick wrench tightening
  • Provides secure, leak-resistant threaded connections
  • Compatible with Graco systems using matching NPTF ports

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Reduce Pipe Thread Sizes with a Secure OEM Connection

Compatible Machines

  • Graco lubrication and fluid handling systems requiring a 3/8 in. NPTF male x 1/4 in. NPTF female reducing fitting.
  • Compatible with Graco equipment and assemblies that specify Part No. 556404 in the official parts list.
  • Suitable for Trabon and other Graco lubrication systems using matching NPTF threaded ports.

Product Overview

The Graco 556404 Fitting, 3/8 X 1/4 NPTF Hex Red is a genuine OEM reducing bushing designed to connect components with different NPTF thread sizes in Graco lubrication and fluid handling equipment. It features a 3/8-inch male NPTF thread and a 1/4-inch female NPTF thread, providing a reliable transition while maintaining a secure, leak-resistant connection.

Its durable metal construction and hex body simplify installation with standard wrenches, making it an ideal replacement for maintaining the integrity and performance of industrial lubrication and fluid transfer systems.

Key Features

  • Genuine Graco OEM reducing fitting.
  • 3/8 in. male NPTF x 1/4 in. female NPTF thread configuration.
  • Hex body allows easy installation and removal.
  • Durable metal construction for industrial service.
  • Provides secure, leak-resistant threaded fluid connections.

Applications

The Graco 556404 fitting is commonly used in centralized lubrication systems, grease distribution networks, fluid transfer assemblies, and industrial maintenance equipment where a reduction from a 3/8-inch threaded connection to a 1/4-inch threaded port is required. Using the correct OEM fitting helps preserve system performance and minimizes the risk of leaks.

Frequently Asked Questions

It reduces a 3/8-inch male NPTF threaded connection to a 1/4-inch female NPTF connection while maintaining a secure seal.

Yes. Part 556404 is a genuine OEM Graco fitting designed for compatible Graco lubrication and fluid handling systems.

It is used in Graco lubrication and fluid handling equipment, including Trabon systems and other assemblies that specify Part No. 556404.

The correct OEM fitting ensures proper thread engagement, dependable sealing, reliable fluid flow, and long-term equipment performance.

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