Vacuum Cups and Suction Cups BF Series Fittings for Small Suction Cups and Vacuum Cups Product Photo (Click for larger view and Information) Item Number Connection Thread Size Overall Dia. in. (mm) Static Height in. (mm) BF1.2-OR 10-32 (5 mm) male 1/4″ hex 0.42 (11) BF3-SHEX 10-32 (5 mm) male 1/4″ hex 0.42 (11) BF3-OR 10-32 (5 mm) male – – 21700253 10-32 (5 mm) male – 0.36 (9) BF7FL-OR 10-32 (5 mm) male 5/16″ hex 0.51 (13) BF12FL-OR 10-32 (5 mm) male 1/2″ hex –