such that rotating the first connector 10 in the right hand clockwise direction enables the internal threads to travel along and engage mating threads on the mating threaded connector 12 in this regard the mating connector 12 includes a set of internal threads 18 that engage corresponding external threads 14 of the first connector and mating external threads 20 that engage corresponding internal threads 16 of the first connector of course these corresponding internal and external threads 18 and 20 respectively of the mating threaded connector 12 are also synchronized with each other so that they mate with and engage the synchronized external threads 14 and internal threads 16 respectively of the first threaded connector 10 as the two threaded connectors are screw threaded together in the embodiment shown in fig1 all of the thread sets 14 16 18 and 20 are straight threads as opposed to tapered pipe threads straight threads are not designed to serve as fluid seals between the two mating threaded pieces therefore the embodiment of fig1 includes an o ring 22 in the bottom of the annular channel defined by the second connector synchronized internal threads 18 and external threads 20 for providing the fluid seal between the first and second threaded connectors 10 12 of course the.