4" NH (NST) Male x 4" NPT Male Adapter Aluminum HA25S15S but tested once a year

but tested once a year to ensure optimal function

How Should I Use This Hose

Fire Hose 100-150 Feet (Choose NH/NST Fire Hose Threads or NPSH/IPT Straight Pipe Threads)

Hose Shank Inside Diameter: 6" (Barb)

Fire hoses come in two styles: single and double "jacket" or "layer"

4" NH (NST) Male x 4" NPT Male Adapter Aluminum HA25S15S but tested once a yearSpecifications Male Side 1 4 NH (NST) Male (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