Heavy Duty Fire Hydrant Lock (USA) Threads_NPT x NPT Aluminum 4 inch female camlock

Aluminum 4 inch female camlock (Cam & Groove) coupler to 2 inch male camlock (Cam & Groove) coupler

Face the reflective part of the road marker in the direction of traffic when being used on the road or facing the entrance of a driveway

NST also goes by the initials NH or National Hose

Global type "E" brass 3 inch male camlock (Cam & Groove) coupler to 3 inch hose shank

The female threaded side of this adapter will only connect to a 2 inch male National Pipe Tapered (NPT)

Heavy Duty Fire Hydrant Lock (USA) Threads_NPT x NPT Aluminum 4 inch female camlockNote: Check with your local Fire Marshal's Office to verify that these can be used in your juristiction. The Fire Hydrant Lock deters access to a fire hydrant's operating nut to prevent unauthorized water usage and unwanted access to the potable water system. The fire hydrant lock's outer shell comes with a 2 inch wide reflective band that makes it easier to locate the fire hydrant at night. Red ductile iron lug extension secures to existing 1 1 2