

High-precision Nylon HD piston designed to deliver stable pressure and smooth reciprocating performance in compatible Graco airless spray pump systems.
The Graco 01/0055-1Z/89 Piston 12.344 0.194 Nyl Hd is designed for select Graco airless sprayer pump assemblies requiring a 12.344” piston with 0.194 specification and Nylon HD construction for stable high-pressure performance.
The Graco 01/0055-1Z/89 is a precision-engineered piston component used in professional airless spray pump systems. Manufactured from Nylon HD, it delivers high strength, low friction operation, and excellent wear resistance under continuous hydraulic pressure.
With exact dimensions of 12.344 x 0.194, this piston ensures precise sealing and smooth reciprocating movement within compatible Graco pump cylinders, maintaining stable pressure output and consistent spray performance in demanding coating applications.
It is commonly used in pump rebuilds and maintenance operations where OEM-grade fitment and long-term durability are required.
Used in industrial painting, protective coatings, commercial construction finishing, and maintenance environments where Graco airless sprayers operate under continuous high-pressure conditions.