Black Iron, Brass and Cast Iron Threaded Plugs & End Caps For Radiators
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Plugs & End Caps

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Plugs for renovation of reclaimed cast iron radiators and to use on new ones too. Read about BSP sizes here.Black iron plugs are tapered so that the seal is made on the threads. Our cast iron and steel plugs tend to have parallel threads and require a gasket to make a seal.