The UnitedBuilt Choice 5406-P-16 is a external-hex pipe plug with a 1" male NPTF connection.
This external-hex plug closes a compatible female tapered pipe opening when the equipment design calls for that port to be unused. Its male NPTF connection is a pipe thread, not an SAE O-ring boss connection. Match the thread form and nominal size before installing a replacement.
Close a matching pipe-thread opening
The external hex provides a wrenching surface for installation and removal. This form differs from a socket or internal-hex plug, which uses a tool inside the head. Check the available clearance around the port and choose the correct tool before starting work; no wrench size is specified here.
| Feature |
Benefit |
| Male NPTF plug |
Closes a compatible female pipe port that is not being used. |
| External hex head |
Provides wrench access for installation and later removal. |
Technical specifications
| Specification |
Detail |
| Brand |
UnitedBuilt Choice |
| Part number |
5406-P-16 |
| Series |
5406-P |
| Configuration |
External-hex plug |
| Connection |
1-inch male NPTF |
| Thread |
1-11.5 |
Before ordering
A plug can retain pressurized fluid behind the connection, so do not loosen it to check whether the circuit is safe. Follow the equipment’s isolation and pressure-release procedure first. Inspect the female port and plug threads for damage or contamination, then use the actual supplier’s tightening and sealant instructions.
| Check |
What to confirm |
| Port thread |
Confirm a compatible 1-inch female pipe port for the 1-11.5 male NPTF thread. |
| Plug style |
Select the external-hex 5406-P form, not an internal-hex plug or reducing bushing. |
| Permitted closure |
Confirm the equipment design allows this port to be closed; do not obstruct a required vent or safety function. |
| Safe service |
Isolate and fully depressurize the circuit before installing or removing the plug. |
Confirm the supplied part’s pressure and temperature limits, material compatibility and suitability for the operating fluid before installation. Connection size alone does not establish a service rating. Isolate and fully depressurize the circuit before work, and follow the equipment and fitting supplier’s installation procedure.
Need help selecting the correct port plug? Contact UnitedBuilt through online chat, email parts@unitedbuilt.com, or call 602-253-7750 with the port thread, existing plug number and equipment application.
