4" NH (NST) Female Swivel x 3.5" NPSH Female Rigid Adapter Aluminum DMH25F25NYFD Once you get above 48

Once you get above 48 volts it becomes trickier

Change Threads From Female NPSH Pipe To NPT Male Pipe With An Easy Swivel Adapter

Camlock Male Diameter Sizes: 3" (Plug)

1-1/2" NH-NST Female (Inlet) x 1-1/2" NH-NST (Outlet) x 1" NPSH (Outlet)

Shell Diameter: 7"

4" NH (NST) Female Swivel x 3.5" NPSH Female Rigid Adapter Aluminum DMH25F25NYFD Once you get above 48Specifications Female Side 1 4 NH (NST) Female (National Hose National Standard Thread) Female Side 2 3. 5" NPSH Female (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