The GRACO 121478 is a compression fitting designed to connect 3/16 inch tubing to a 1/4 inch NPT (National Pipe Thread) port. Its construction is typically stainless steel (SST), as indicated by some suppliers, and it is intended for use in fluid handling systems within GRACO equipment, such as lubrication or hydraulic applications.

Key Features:

• Compression Fitting
• 3/16 inch tubing x 1/4 inch NPT
• Stainless Steel (SST) or Brass (varies by supplier; SST is specified by Hydradyne LLC)
• Designed for use with 3/16 inch tubing and 1/4 inch NPT threaded ports
• Provides a secure, leak-resistant connection between tubing and threaded ports; suitable for demanding industrial environments

Applications:
Used in fluid transfer systems, lubrication, and hydraulic applications within GRACO equipment. Suitable for industries such as mining, agriculture, and manufacturing where reliable fluid connections are essential.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance within GRACO systems.
• Ensure tubing is cut cleanly and squarely; insert tubing fully into the fitting before tightening the compression nut; hand-tighten, then use a wrench for a secure fit; avoid over-tightening to prevent damage to the fitting or tubing.
• Regularly inspect fittings for leaks or wear; replace fittings if signs of corrosion or damage are present; use appropriate thread sealant on NPT threads if required.