The GRACO 17G859 is a black jam nut, typically used as a locking or securing component within GRACO fluid handling and spray equipment. Its material is not explicitly stated, but jam nuts are generally made from steel or alloy, often with a black oxide or similar finish for corrosion resistance. This part is intended to secure threaded connections and prevent loosening under vibration or pressure in GRACO systems.

Key Features:

• Jam Nut
• Designed for use with GRACO equipment; specific compatibility depends on application and model
• Secures threaded connections
• Prevents loosening under vibration or pressure
• Black finish for corrosion resistance

Applications:
Used in GRACO fluid handling, spray, and dispensing equipment to lock threaded components in place, ensuring reliable operation and preventing leaks or disassembly during use.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, performance, and safety within GRACO equipment.
• Ensure threads are clean and undamaged before installation
• Tighten securely to prevent loosening, but avoid over-torquing
• Use appropriate tools for installation to avoid damage to the nut or equipment
• Regularly inspect for signs of wear, corrosion, or loosening
• Replace if damaged or if threads are compromised