Vacuum Cups and Suction Cups Vacuum Cup Fittings – Male-to-Male Connection Adapters Part Number: HSHN5X6 Vacuum Fitting Part No. Connection Thread Size Thru Hole Diameter in. (mm) Hex Size in. (mm) L Height Added to Assembly in. (mm) H Height in. (mm) Item Weight oz. (grams) HSHN5X6 M6 (6mm) male – M5 (5mm) male 0.11 (2.7) 0.50 (13.0) 0.13 (3.3) 0.51 (13.0) 0.081 (2.3)