RSM250F Dixon Cast Brass Female Swivel x Male Adapter - Rocker Lug - 2-1/2" Female NST(NH) x 2-1/2" Male NPTPart Number Female Swivel Thread Male Thread Weight (Lbs.) RSM150F 1 1 2" Female NST(NH) 1 1 2" Male NPT 1. 1000 RSM150S 1 1 2" Female NPSH 1 1 2" Male NPT 0. 9300 RSM25F20T 2 1 2" Female NST(NH) 2" Male NPT 2. 2100 RSM250F 2 1 2" Female NST(NH) 2 1 2" Male NPT 2. 8100 RSM25F30T 2 1 2" Female NST(NH) 3" Male NPT 3. 0000