

Seals unused DIA 6 ports in Graco lubrication manifolds, maintaining pressure integrity and preventing leakage in injector and junction box systems.
| Machine / System | Application Area |
|---|---|
| Graco GL-32 Grease Injector Systems | Automatic lubrication manifolds (industrial & vehicle service systems) |
| Graco GL-33 Grease Injector Systems | Multi-point lubrication injector manifolds for machinery and fleet equipment |
| Graco Junction Box Assembly (18B-series manifolds) | Control and distribution assemblies in pneumatic lubrication systems |
The Graco 18B929 Plug, Dia 6 is a precision-engineered OEM sealing component designed for Graco lubrication and fluid handling systems. It is used to securely close or seal unused 6 mm diameter (DIA 6) ports in manifold or junction box assemblies, ensuring system integrity, pressure stability, and leak-free operation. Manufactured to Graco’s OEM standards, it delivers reliable performance in high-pressure industrial lubrication environments.
This plug plays a critical role in maintaining system efficiency by preventing contamination, pressure loss, and fluid leakage within automated lubrication networks.
The 18B929 Plug is primarily used in Graco’s modular lubrication manifold systems where DIA 6 fittings and ports are present. It is commonly installed in:
According to Graco parts breakdown documentation, the plug is installed in junction box assemblies alongside other DIA 6 fittings and control components, ensuring unused ports remain securely sealed during system operation.