Banjo fitting

It is typically used to connect a fluid line to a rigid, internally threaded hydraulic component.

A flexible hose or a rigid pipe may be connected to the union port.

[1] The main advantage of the fitting is in high pressure applications (i.e. more than 50 bar).

It also allows the pipe exit direction to be adjusted relative to the fitting, then the bolt tightened independently.

Banjo fittings are commonly found in automotive fuel,[2] motor oil and hydraulic systems (e.g.: brakes and clutch).

An example of typical banjo fitting components (left) with an identical fitting connecting a hose to a tee fitting.
An example of typical banjo fitting components (left) with an identical fitting connecting a hose to a tee fitting.
A general schematic, not to scale, showing the fluid path in an assembled banjo fitting.
A general schematic, not to scale, showing the fluid path in an assembled banjo fitting.
A pair of banjo bolts as used in automotive braking.
Two banjo fittings (upper center of photo) atop automotive brake calipers . The copper crush washer in the gap between the fitting and body of the caliper completes the seal.