Fittings are classified as below.
Tube to tube fittings
These fittings are used to connect two different tubes.
Stud Fittings – Adjustable and Non adjustable
These fittings are used to connect a tube to a pump, manifold blocks or any other female ports.
These fittings can be oriented to any desired position (360º) to match the mating tube or fitting or hose
These fittings are specifically used with flexible hoses
Adaptors (Male- Male or Male-female etc)
Large varieties of adaptors having different threadings like, BSP, BSP Taper, NPT, UNF, Metric with external as well as internal threading to match end fittings.