# NPTF — Hydraulic and pipe connection type identification

For NPTF, region of origin is American Connections; thread type (tapered or parallel) is tapered thread; seal method is They have a tapered thread by which a seal is made by deformation of the threads, recorded from its source on 2026-08-13.

- **Connection type:** NPTF _(verified: appears in the quote below)_
- **Governing standard:** NPTF _(verified: appears in the quote below)_
- **Region of origin:** American Connections _(our reading, not quoted from the source)_
- **Thread type (tapered or parallel):** tapered thread _(verified: appears in the quote below)_
- **Seal method:** They have a tapered thread by which a seal is made by deformation of the threads. _(verified: appears in the quote below)_

## What the source says

> NPTF (National Pipe Tapered Fuel) -style connections are widely used in fluid power systems. They have a tapered thread by which a seal is made by deformation of the threads. NPTF Threads are measured at the thread diameter and subtracting 1/4-inch to establish the nominal pipe size.

## Source

- https://brennaninc.com/connection-types/

Last verified: 2026-08-13. Review by: 2028-08-12.
Part of [Hydraulic and pipe connection type identification](https://referencesource.org/industrial-cross-reference-bearings-seals-fittings/).