ANVER Vacuum Cups and Suction Cups Vacuum Cup Fittings – Female-to-Female Connection AdaptersG 1/8″ Thread Connector – Part Number: HS18G-18F-G Vacuum Fitting Part No. Thru Hole Dia. in. (mm) or Thread Connection Thread Size Hex Size in. (mm) LHeight Added to Assembly in. (mm) HS18G-18F-G G 1/8″ female Double G 1/8″ female 0.51 (12.9) 0.59 (15) The “G” thread is also known as BSPP, commonly used world-wide for Vacuum Applications. Material: All-metal, electro-less nickel-plated brass fitting