RSF250F Dixon Cast Brass (Open Snoot) Female Swivel Adapter - Rocker Lug - 2-1/2" Female NST(NH) x 2-1/2" Female NPTFeatures: Double female rigid hexagon to swivel connection, rigid end thread is always NPT, hose thread is on swivel end. Part Number Female Swivel Thread Female Rigid Thread Weight (Lbs.) RSF150F 1 1 2" Female NST(NH) 1 1 2" Female NPT 0. 9400 RSF25F15T 2 1 2" Female NST(NH) 1 1 2" Female NPT 4. 8600 RSF25F20T 2 1 2" Female NST(NH) 2" Female NPT 2. 6700 RSF250F 2 1 2" Female NST(NH) 2 1 2" Female NPT 2. 8100 RSF25F30T 2 1 2" Female NST(NH) 3" Female