AN Lines on a P38

So this whole story started with my engine oil cooler lines starting to weep oil where the rubber joins to the steel hoses.
I had some AN8 bungs welded onto my engine and gearbox oil coolers and fitting some very nice looking lines.
Then it kinda became an obsession where i want even more AN. Im now almost done replacing my fuel line with AN6 lines.

FEI said:

So this whole story started with my engine oil cooler lines starting to weep oil where the rubber joins to the steel hoses.
I had some AN8 bungs welded onto my engine and gearbox oil coolers and fitting some very nice looking lines.
Then it kinda became an obsession where i want even more AN. Im now almost done replacing my fuel line with AN6 lines.
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AN?

AN stands for army navy. Its a very universal usage fitting style developed by the americans in like 1930 i think to be field serviceable, reusable and not need any special tools to assemble. Most of the stuff is rated upto 1000psi and 260 deg celsius.