This is a 10 PK of a After-Market Weatherhead 06U508 fitting. 3/8" hose with 1/2" threads. All of our fitting come with plastic caps to protect the threads during shipping or in storage. This fitting crimps great in a Weatherhead crimper and as a Parker, Dayco, HY crimpers. If you can not find the fitting your looking for, please let me know, we stock 2,750 different fitting.