The GRACO 17N040 is a piston nut, a critical component used to secure the piston within certain GRACO pump assemblies. Its material is not explicitly stated, but GRACO piston nuts are typically constructed from durable metals such as steel or alloy for strength and longevity. This part is essential for maintaining the integrity and proper function of the piston assembly in GRACO spray equipment.

Key Features:

• Piston Nut
• 17N040
• Compatible with select GRACO pump assemblies (e.g., referenced in manuals for sealed 4-ball lowers)
• Designed for secure fastening and reliable performance in high-pressure environments; critical for equipment reliability and maintenance

Applications:
Used in GRACO spray equipment, specifically in pump assemblies such as sealed 4-ball lowers, to secure the piston and ensure proper operation of the pump.

Installation Notes:

• Using a genuine GRACO piston nut ensures proper fit, performance, and safety in high-pressure applications.
• Torque the piston nut to manufacturer specifications (e.g., 95–100 ft-lb or 129–135 N•m as referenced in similar GRACO manuals). Ensure sealant is allowed to cure for a minimum of 12 hours before use if specified. Always follow the equipment manual for specific installation procedures.
• Inspect the nut and mating surfaces for wear or damage before installation. Use appropriate tools to achieve correct torque. Replace with genuine GRACO parts for optimal performance and safety.