Straight push-in coupling for 8mm hose.

With PTC connection for 8mm hose and 1/4" BSP and NPT male threads.

The male thread is short and tapered, allowing the coupling to be screwed into both BSP and NPT inlets. For a secure seal, the coupling is equipped with a sealing ring.
The coupling housing is made of brass with an NBR O-ring.

You can screw this coupling into a 1/4" BSP or NPT inlet and connect a 8mm air tube.

This coupling is easy to use by pushing the hose into the end of the coupling until it is firmly in place. The tube can be easily removed by pushing the ring back toward the coupling and pulling the hose out.

Abbreviations:

PTC: Push To Connect.
NPT: National Pipe Thread, thread primarily used in the US.
BSP: British Standard Pipe, also known as "Gas Thread."
8mm hose: The outside diameter of the hose is 8 millimeters.
O-ring: Rubber sealing ring.
NBR: Nitrile rubber.

More information about hose sizes and threads can be found here: About Threads