4" NH (NST) Female Hose Lightweight Aluminum Fire Cap 3/4" Inch NPSH Available in 11/2" NH (NST)

Available in 11/2" NH (NST) or NPSH (IPT) threads

5" NH/NST outlet (NH/NST are the same threads by the way)

Threaded Size (Inside Diameter): 6" Female NPT (National Pipe Tapered)

Most internal fire fighting hose applications - whether from fire fighters bringing hose or stationary pin rack units - use 1-1/2" fire hose and

4" NH (NST) Female Hose Lightweight Aluminum Fire Cap 3/4" Inch NPSH Available in 11/2" NH (NST)Specifications Female Side 4 NH (NST) Female (National Hose National Standard Thread) 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 Standards 5100 190C Tables 1 4