Miniature Vacuum Ball Valves Model #: BVC-14-MF Vacuum ValvesMiniature Ball Valves Model No.: BVC-14-MF Part No. AMale Thread BFemale Thread Orifice in. (mm) Cin. (mm) Din. (mm) Ein. (mm) Fin. (mm) BVC-14-MF 1/4″ NPT 1/4″ NPT 0.217 (5.5) 1.81 (46.0) 0.551 (14.0) 0.75 (19.0) 0.83 (21.0)