

The Graco 194358 Plug 1/2‑14 NPT is a threaded plug used to safely seal unused 1/2‑inch NPT female ports on pumps or fluid systems. It ensures leak‑free sealing and maintains system integrity when portions of fluid‑path are not in use.
The Graco 194358 Plug 1/2‑14 NPT is a threaded plug designed to seal 1/2‑inch NPT (National Pipe Thread) female ports on pumps, manifold outlets/inlets or fluid‑system fittings. It provides a secure seal to prevent leaks, fluid loss or contamination when a port is not in use. Using a properly threaded NPT plug ensures reliable sealing under pressure — maintaining system integrity and safety.
| Specification | Details |
|---|---|
| Part Number | 194358 |
| Component Type | Thread Plug (1/2‑14 NPT) |
| Function | Seal 1/2‑inch NPT female ports on pump or fluid‑system fittings |
| Compatible Equipment Types | Pumps, manifolds, hoses or fluid‑system ports using 1/2‑inch NPT threads |
| Thread Standard | 1/2‑14 NPT (tapered pipe thread) |
| Installation | Screw plug into unused port until hand‑tight and then wrench‑tight per threaded‑seal guidelines, using thread sealant as needed for leak prevention. |
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