4.5" NH (NST) Female x 4" NPSH Male Adapter Aluminum DMH3030 The highlight of the 2-1/2"

The highlight of the 2-1/2" hose is low friction loss

It's more economical than it's fire hose counterpart

5" NPSH Male Threads

Male Side 2 – 5” NPT Female (National Pipe Tapered)

The NST (NH) side of adapter can hook into NST (NH) threads only

4.5" NH (NST) Female x 4" NPSH Male Adapter Aluminum DMH3030 The highlight of the 2-1/2"Specifications Female Side 1 4. 5 NH (NST) Female (National Hose National Standard Thread) Male Side 2 4 NPSH Male (National Pipe Straight Hose) 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