

Graco 100083 Coupling (3/8 to 1/4 NPT) is a precision adapter designed to connect hoses or fittings with different NPT thread sizes in Graco sprayers and ram systems.
The Graco 100083 Coupling (3/8 to 1/4 NPT) is used across several Graco fluid systems that transition from 3/8 NPT to 1/4 NPT ports.
The Graco 100083 Coupling is a compact adapter for connecting 3/8 NPT to 1/4 NPT threads in high-pressure coating and mortar systems. Use it to bridge hoses, valves, or ports of different NPT sizes while maintaining a tight, tapered-thread seal.
| Part Number | 100083 |
|---|---|
| Type | Coupling / Adapter |
| Thread Sizes | 3/8 NPT to 1/4 NPT |
| Thread Standard | NPT (National Pipe Taper) |
| Typical Use | Connects mismatched NPT ports/hoses in Graco sprayers, ram units, and mortar systems |
| Pressure/Material | Refer to your equipment manual for exact rating and material suitability |
Where This Coupling Helps