SM400F Dixon Cast Brass Female Swivel x Male Adapter - Pin Lug - 4" Female NST(NH) x 4" Male NPTPart Number Female Swivel Thread Male Thread Weight (Lbs.) SM150F 1 1 2" Female NST(NH) 1 1 2" Male NPT 1. 1100 SM25F15T 2 1 2" Female NST(NH) 1 1 2" Male NPT 2. 4300 SM25F20T 2 1 2" Female NST(NH) 2" Male NPT 2. 4500 SM250F 2 1 2" Female NST(NH) 2 1 2" Male NPT 2. 6400 SM25F30T 2 1 2" Female NST(NH) 3" Male NPT 2. 7600 SM400F 4" Female NST(NH) 4" Male NPT 9. 0000 SM150S 1 1 2" Female NPSH 1 1 2" Male NPT 1. 0100 SM200S 2" Female NPSH 2" Male NPT 2.