4" Storz x 4 1/2" NH Fire Hydrant Converter Couplings_Aluminum 50PF25YL = HFX50X25Y50S or RC50-450Y-25-STZ

50PF25YL = HFX50X25Y50S or RC50-450Y-25-STZ

NH or NST: National hose or national standard thread is often referred to as fire hose thread as this is by far the most common thread in use today by fire departments

Hose remains flexible to -65° F (-45° C)

The most common fire fitting thread in the United States is 2 1/2 inch NH /NST

4" Storz x 4 1/2" NH Fire Hydrant Converter Couplings_Aluminum 50PF25YL = HFX50X25Y50S or RC50-450Y-25-STZStorz fire hydrant adapter with nut cap permanently converts a fire hydrant outlet from threads to storz. Enables quick connections of large diameter hoses (LDH) by fire departments to fire hydrants. Stainless steel cable secures cap Hard coat anodized finish per MIL A 8625 TYPE III,Class 1 Prevents wear and resists corrosion