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Custom threads are available
male coupling on top
protective flap and 3M™ Scotchlite Reflective Material
75% lead-free
Fire Rescue
Brass 3" NH Plug (Pin Lug) Outlet Threads_NH / NST Custom threads are availableIf your FDC or female swivel connection is approx. 3 1 2 inch inside diameter, you need this plug. If your FDC is approx. 3 inches, you need 2 1 2 inch plug which is the most common in the US. Please contact your local fire department. Safety Notes Not intended for pressure applications for protection only Note 3 inch NH NST is very rare and is often confused with 2. 5 inch NH NST which is very common. If you have a fire department connection (FDC),
