SAE Straight Thread O-ring or O-Ring Boss (ORB) is a multipurpose thread ideal for medium and high-pressure hydraulic applications. The male thread contains an o-ring at the base which mates with a chamfer machined into the female counterpoint, which makes this thread type ideal for non-leak applications.
In order to properly identify ORB threads, please consult the outside and inside diameters of male and female threads respectively. Each of our ORB fittings contain a thread chart in the description for your convenience. Torque specifications and pressure ratings can be found within our resources as well.