The GRACO 556661 is a straight connector tube fitting designed for use with 3/16 inch tubing and 1/8 inch NPT (National Pipe Thread) connections. It is constructed from steel with a zinc finish, intended for reliable, leak-free connections in fluid transfer systems, particularly for oil and grease applications in on-road vehicles.

Key Features:

• Straight Connector
• 3/16 inch Tube x 1/8 inch NPT
• Steel with zinc finish
• Maximum working pressure: 21 bar (2100 kPa, 300 psi, 2.1 MPa)
• Oil, grease; for use with tubing in on-road vehicle applications
• Push-to-connect and threaded connection options
• Durable steel construction for long service life
• Zinc finish for corrosion resistance
• Reliable, leak-free performance

Applications:
Primarily used in on-road vehicle lubrication systems for connecting tubing in oil and grease delivery circuits.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance within GRACO equipment.
• Ensure tubing and threads are clean and free from debris before installation
• Hand-tighten threaded connections before final tightening with a wrench to avoid cross-threading
• For push-to-connect fittings, ensure tubing is cut squarely and fully inserted for a secure fit
• Regularly inspect fittings for leaks or wear and replace as necessary