ANVER Vacuum Cups and Suction Cups Vacuum Cup Fittings – Female-to-Male Connection AdaptersPart Number: HS6-18M Vacuum Fitting Part No. Thru Hole Diameter in. (mm) or thread Connection Thread Size Hex Size in. (mm) LHeight Added to Assembly in. (mm) HHeight in. (mm) HS6-18M* 0.2 (5) M6 (6 mm) female to 1/8″ NPT male 0.51 (13) 0.17 (4.3) 0.47 (12) * Must be ordered with HS6 if mounting to ANVER Cup Material: All-metal, electro-less nickel-plated brass fitting