Graco 121237 3/8 MNPT x 1/2 FNPT Straight Fitting

Graco 121237 Straight Fitting – 3/8 MNPT x 1/2 FNPT

The Graco 121237 Straight Fitting (3/8 MNPT x 1/2 FNPT) is an OEM adapter designed to provide a secure, leak-resistant transition between two differently sized ports in Graco fluid-handling and spraying systems. Built for durability and reliability, it supports high-pressure applications and ensures stable fluid transfer.

Compatible Machines

This OEM fitting is commonly used across multiple Graco systems requiring a 3/8 MNPT to 1/2 FNPT connection. Typical compatible equipment includes:

• Graco Reactor 2 Series (E-Series, H-Series, XP-Series)
• Graco Reactor 3 Series (select models)
• Graco Hydraulic & Pneumatic Proportioners
• Graco Spray Foam & Polyurea Systems with mixed-size porting
• Other Graco equipment using 3/8 MNPT → 1/2 FNPT transitions

Note: Always verify with your equipment manual to ensure exact compatibility.

Key Features

• OEM Precision Fit: Designed specifically for Graco systems.
• High-Pressure Capable: Supports demanding fluid applications.
• Corrosion-Resistant: Built with durable metal construction.
• Leak-Resistant Seal: Machined threads ensure secure connections.
• Easy Installation: No special tools required.

Technical Specifications

Usage & Installation Notes

• Ensure both ports are clean before threading to prevent leaks.
• Apply thread sealant or tape as recommended by Graco.
• Avoid over-tightening to protect threads and maintain sealing integrity.
• Inspect fittings routinely on high-pressure systems.

Why Choose the Genuine Graco 121237?

• Guaranteed Fit: Consistent with Graco engineering standards.
• Enhanced System Reliability: Prevents leaks that can affect spray performance.
• Long Service Life: Engineered for continuous industrial use.

Frequently Asked Questions