

Thread adapter designed to connect 1/4-28 fittings to 1/8 NPTF ports for reliable fluid and lubrication system connections.
| Compatible Equipment | Application |
|---|---|
| Graco sprayers and fluid handling equipment using OEM part 557955 | Provides a reliable adapter connection between components with different thread requirements. |
| Selected Graco pumps, lubrication systems, and serviceable assemblies | Designed for applications requiring a 1/4-28 × 1/8 NPTF adapter fitting. |
The Graco 557955 Fitting, Adapter 1/4-28 X 1/8 Nptf is a genuine OEM adapter fitting designed to provide a secure transition between threaded components in compatible Graco equipment. Manufactured to Graco specifications, it supports accurate installation and dependable fluid or air connections.
Featuring a 1/4-28 × 1/8 NPTF configuration, this adapter helps ensure proper thread compatibility while maintaining reliable sealing performance. Using the correct OEM fitting helps reduce leaks, simplify maintenance, and preserve equipment operation.
OEM adapter fittings are manufactured to match Graco equipment specifications, helping maintain proper alignment, reliable sealing, and consistent system performance during installation, repair, and maintenance.