4" NH (NST) Female Swivel x 4" NPT Male Adapter Aluminum DMH1515T This design fits every hydrant

This design fits every hydrant from every manufacturer conforming to standard 2-1/2" NST (NH) threads

or Male & Male Aluminum Camlocks

1-1/2" Female Camlock With "Hose Shank" & Clamps

they encounter something relatively sharp

4" NH (NST) Female Swivel x 4" NPT Male Adapter Aluminum DMH1515T This design fits every hydrantSpecifications Female Side 1 4 NH (NST) Female (National Hose National Standard Thread) Male Side 2 4" 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