4" NH (NST) Female Swivel x 6" NPT Male Adapter Aluminum HA1515F It's a very common fitting

It's a very common fitting in USA industry

Just pull them apart

5” NPT Female x 1

Warranty - 5 Year

Industrial & Fire 6” NPSH Female Long Handle x 6” NPSH Female Long Handle Swivel Fitting Anodized Aluminum

4" NH (NST) Female Swivel x 6" NPT Male Adapter Aluminum HA1515F It's a very common fittingSpecifications Female Side 1 4 NH (NST) Female (National Hose National Standard Thread) Male Side 2 6" NPT Male (National Pipe Tapered) Working Pressure 300PSI Max Test Pressure 1000PSI Max Material T 6061 Aluminum (Aircraft Grade) Finishing Anodized (99. 9% Lead Free) NFPA Standards 1963, 4. 12, 5. 1 5. 6. 4 (Corrosion Resistance) Military Standards MIL A 8625 Type III, Class 1 Industrial Standards International ASTM B221 UL Labs Standards 236 8. 1