2.5" NH (NST) Female Swivel x 4.5" NPT Male Adapter Aluminum HA3025F For the 1 1/2" diameter

For the 1 1/2" diameter

4" NPT Male x 4

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2.5" NH (NST) Female Swivel x 4.5" NPT Male Adapter Aluminum HA3025F For the 1 1/2" diameterSpecifications Female Side 1 2. 5 NH (NST) Female (National Hose National Standard Thread) Male Side 2 4. 5" 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