Vacuum Cups and Suction Cups Vacuum Cup Fittings – Female-to-Male Connection AdaptersPart No. HS14-14M-G Part No. Description A Male Connection Thread B Female Connection Thread Hin. (mm) Lin. (mm) SW (Hex) Fitting Material HS14-14M-G Adapter, G 1/4″ – male to 1/4″ NPT – female G1/4″ 1/4″ NPT 0.31 (8) 0.87 (22) 0.67 (17) Electro-Less Nickel-Plated Brass with Black Plastic Washer The “G” thread is also known as BSPP, commonly used world-wide for Vacuum Applications. Material: All-metal, electro-less nickel-plated brass fitting Available Vacuum Suction Cups that use Fitting No. HS14-14M-G (Click images below for more information)