Aluminum 4" Storz x 5" Swivel Female NH Thread Threads_NPT 5 inch NH / NST

5 inch NH / NST which is very common

snow plow drivers and highway maintenance personnel will be able to see and avoid damaging the hydrants

or overhaul

Black 4 inch heavy-duty camlock rubber water suction and discharge hose

Aluminum 4" Storz x 5" Swivel Female NH Thread Threads_NPT 5 inch NH / NSTStorz Head component shall be forged from Alloy 6061 aluminum and heat treated to T6 temper. Adapters and components meet the requirements of NFPA 1963. Locking Storz are only available on 4, 5, and 6 inch. Locking springs prevent unintentional disconnects. Locks are stainless steel. The Safe Water Drinking Act section 1417 requires "Lead Free" products to be a minimum of 99. 75% lead free.