ANVER Vacuum Cups and Suction Cups Vacuum Cup Fittings – Female-to-Female Connection AdaptersPart Number: HS6-14F Vacuum Fitting Part No. Thru Hole Diameter in. (mm) or thread Connection Thread Size Hex Size in. (mm) LHeight Added to Assembly in. (mm) HS6-14F* 0.2 (5) M6 (6 mm) female to 1/4″ NPT female 0.63 (16) 0.63 (16) * Must be ordered with HS6 if mounting to ANVER Cup Material: All-metal, electro-less nickel-plated brass fitting