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Square heads up to 1 1/4 inch
Allows for maximum flow for given pressure at all twist positions
Storz pressure gaskets will seal two storz hose couplings or adapters when pressurized
This product incorporates many ideas given to us by our customers
Custom threads are available
Brass 3" NH Plug (Pin Lug) Outlet Threads_NH / NST Square heads up to 1If 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),
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