FFH1515NYFD Dixon Cast Brass Double Female Hex Adapter - 1-1/2" Female NPT x 1-1/2" Female NYFDPart Number Female Thread Female Thread Weight (Lbs.) FFH1515F 1 1 2" Female NPT 1 1 2" Female NST(NH) 0. 5300 FFH2525F 2 1 2" Female NPT 2 1 2" Female NST(NH) 1. 5000 FFH15F15F 1 1 2" Female NST(NH) 1 1 2" Female NST(NH) 0. 6850 FFH25F25F 2 1 2" Female NST(NH) 2 1 2" Female NST(NH) 1. 3700 FFH15NYFD15NYFD 1 1 2" Female NYFD 1 1 2" Female NYFD 0. 7400 FFH1515NYFD 1 1 2" Female NPT 1 1 2" Female NYFD 1. 0000 FFH2525NYFD 2 1 2" Female NPT 2 1 2" Female