N54-40F60F Dixon Aluminum Female Swivel x Male Rigid Adapter - Style N54 - Rocker Lug - 4" Female NST(NH) x 6" Male NST(NH)Part Number Female Swivel Thread Male Rigid Thread Old Part #: Weight (Lbs.) N54 15F15F 1 1 2" Female NST(NH) 1 1 2" Male NST(NH) 0. 5000 N54 15F15T 1 1 2" Female NST(NH) 1 1 2" Male NPT ASM150F 0. 5000 N54 15F25F 1 1 2" Female NST(NH) 2 1 2" Male NST(NH) 0. 9170 N54 15S15S 1 1 2" Female NPSH 1 1 2" Male NPSH 0. 5560 N54 15S15T 1 1 2" Female NPSH 1 1 2" Male NPT 0. 5180 N54 25F15F 2 1 2" Female NST(NH) 1 1 2" Male NST(NH) 1. 700 N54 25F15T 2 1 2"