Product Information Material: Cast Brass Male Thread: NPT Select a Product Part NumberMale Thread SizeSwivel ThreadSwivel Thread Size RSM250F2-1/2"NST (NH)2-1/2" RSM25F30T3"NST (NH)2-1/2" RSM250S2-1/2"NPSH2-1/2" RSM150S1-1/2"NPSH1-1/2" RSM25F20T2"NST (NH)2-1/2" RSM150F1-1/2"NST (NH)1-1/2"