Bottle connector 1/4" x H21,8-14 with right hand thread

Code according to CASTEL: 7156/2 RH
Reducing caps for coolant bottles. 1/4 "SAE external thread allows the connection of the cooling system filler hose with the cylinder containing the refrigerant equipped with a standard W 21.8 x 14 right-hand threaded connection. The nut is equipped with a perfectly fitted, durable gasket. Suitable for all cylinders for "traditional" refrigerants from the HCFC and HFC groups.