Description
The GRACO 556650 is a brass tube nut fitting designed for connecting 5/16 inch (7.9 mm) tubing in lubrication and fluid transfer systems. It is intended for use with oil and grease in on-road vehicle applications, providing a secure and durable connection for pneumatic grease jockey mainline tubing.
Key Features:
- Nut Fitting
- 5/16 inch (7.9 mm) tube
- Brass
- Oil, grease; on-road vehicles; 5/16 inch (7.9 mm) tubing
- High durability and precision
- Easy to install
- Reliable connection for fluid transfer systems
Applications:
Primarily used in on-road vehicle lubrication systems for connecting mainline tubing in pneumatic grease jockey setups.
Installation Notes:
- Using genuine GRACO parts ensures compatibility, reliability, and optimal performance of the lubrication system.
- Ensure tubing is cut cleanly and squarely before installation.
- Hand-tighten the nut to avoid over-torquing and potential damage to the fitting or tubing.
- Check for leaks after installation and tighten further if necessary.
- Regularly inspect fittings for signs of wear or leakage.
- Replace fittings if damage or excessive wear is detected.






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