stainless steel quick coupler, 1/2 inch, female socket, male thread
This stainless steel quick coupler. 1/2 inch, female socket, male thread, is a partner in particular to the stainless male plug end with female thread, MCSHC57. This set makes a pair that is the standard quick connect coupler setup while the others will work as well. They are fully stainless, resisting rust and corrosion. You can use a set of the opposite threads, MCSHC31, and, MCSHC86, to differentiate between your service and emergency hookups. This will put one socket and one plug on your air box while at the same time one socket and one plug on your trailer airlines. At the same time this will prevent you from switching your lines.