Product Information Material: Cast Brass Female Thread: NPT Select a Product Part NumberFemale Thread SizeSwivel ThreadSwivel Thread Size RSF250F2-1/2"NST (NH)2-1/2" RSF250S2-1/2"NPSH2-1/2" RSF25F20T2"NST (NH)2-1/2" RSF150F1-1/2"NST (NH)1-1/2" RSF25F30T3"NST (NH)2-1/2" RSF25F15T1-1/2"NST (NH)2-1/2"