The GRACO 171858 is a special jam nut designed for use in GRACO equipment. Its material is not specified in available documentation, but typical GRACO jam nuts are made from durable metals such as steel or stainless steel. This part is intended to secure and lock components such as valve stems or housings in place, preventing loosening during operation.

Key Features:

• Jam Nut, Special
• Designed for use with GRACO equipment; specific models not listed
• Secures and locks components in place
• Prevents loosening during operation
• Designed for reliability and ease of maintenance

Applications:
Used in GRACO fluid handling and lubrication systems to secure critical components such as valve stems or housings, ensuring safe and reliable operation.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, function, and safety, reducing the risk of equipment failure or leaks.
• Torque jam nuts to manufacturer specifications (e.g., 21–35 ft-lb for similar GRACO nuts as referenced in manuals)
• Ensure proper alignment of components before tightening
• Inspect for wear or damage before installation
• Use appropriate tools to avoid over-tightening or stripping threads