A MJ-06-06 | 3/8" hose x 3/8" JIC male fitting is a type of hydraulic fitting that consists of two parts: a hose fitting with a 3/8" inside diameter and a JIC male fitting with a 3/8" tube size and a nominal thread size of 9/16"-18. The JIC male fitting has a 37-degree flare that mates with a JIC female fitting, providing a reliable seal in high-pressure hydraulic applications.