* Weatherhead 9355
* Aeroquip 2049
* SAE 140330
* Parker Hydraulics 3107
Material Composition: Fittings from forged or cast pressure resistant carbon steel with a zinc-trivalent anti-corrosion coating NPT and NPSM are pipe thread. NPSM is straight while NPT is tapered. Female National Pipe Straight Mechanical (NPSM) fittings incorporate a 30° seat against the male creating a metal leak resistant connection