What is this bleed valve

[Patrol 1993]

I am doing some maintenance on my patrol.
I was wondering what this bleed valve is for Brakes or Clutch.
I looked on line and cant find any information about it.

Thanks

Neil.

[Bloodyaussie]

It is an air bleed for your clutch... you bleed this first before bleeding your slave cylinder.

[Patrol 1993]

Thanks for that Bloodyaussie.

Neil.