3" NPSH Female x 3" NPT Male Adapter Aluminum FM1515NYFD Threaded Size (Inside Diameter): 8"

Threaded Size (Inside Diameter): 8" Male NPT (National Pipe Tapered)

5" NYFD Female x 2" NPT Male Pin Lug Adapter

5" NPSH Male Threads

You're looking for raw and finished fire hose materials because it's strong and great for all applications

Fire & Industrial 2” NH (NST) x 2” NPT Double Male Fitting Anodized Aluminum

3" NPSH Female x 3" NPT Male Adapter Aluminum FM1515NYFD Threaded Size (Inside Diameter): 8"Specifications Female Side 1 3 NPSH Female (National Pipe Straight Hose) Male Side 2 3 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 Through 8. 2 USDA