The GRACO 551788 is a split lock washer made from stainless steel, designed to secure fasteners and prevent loosening due to vibration or movement within GRACO equipment, such as the Gun Flush Box Module and Air Control Box.

Key Features:

• Split lock washer
• #10
• Stainless steel
• Compatible with GRACO Gun Flush Box Module and Air Control Box
• Split design for secure locking
• Stainless steel for corrosion resistance
• Reliable performance in industrial environments

Applications:
Used in GRACO automated flushing systems for manual spray guns, specifically within the Gun Flush Box Module and Air Control Box, to ensure fasteners remain tight and secure during operation.

Installation Notes:

• Using genuine GRACO parts ensures proper fit, function, and safety within GRACO equipment.
• Install the split lock washer between the nut and the surface to prevent loosening.
• Ensure the washer is seated properly before tightening the fastener.
• Regularly inspect washers for wear or damage and replace as needed.