The GRACO 121688 Connector is a fitting designed to connect 3/8" tubing to a 3/8" NPT (National Pipe Thread) port. Its material is not explicitly stated in available sources, but similar GRACO connectors are typically made from durable metals such as carbon steel or brass. This part is intended for use in fluid handling systems, facilitating secure and leak-free connections between hoses or pipes in GRACO equipment.

Key Features:

• Connector
• 3/8" Tube x 3/8" NPT
• Compatible with 3/8" tubing and 3/8" NPT threaded ports
• Compact size (approx. 0.85" x 1.5" x 0.85")
• Lightweight (approx. 0.085–0.09 lbs)
• Designed for secure, leak-free connections
• Easy to install and maintain

Applications:
Used in fluid transfer systems for connecting hoses or pipes to equipment with 3/8" NPT ports, commonly found in lubrication, spray, and maintenance applications.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance within GRACO equipment.
• Ensure both the tubing and NPT port are clean and free of debris before installation.
• Use appropriate thread sealant or tape on NPT threads for a secure, leak-free connection.
• Hand-tighten the connector, then use a wrench for final tightening, being careful not to overtighten and damage threads.
• Regularly inspect for leaks and wear, replacing the connector if any damage is detected.