s10 brake line metric?? or just metric nut.

[ozzie50]

I want to redue my hardline coming from the master cylinder. Is there any consensus about OD And ID of Metric pipe.... Should I get the standard 1/4 in line and put a metric nut on that? same goes for the larger line. This is one of those easy jobs I would have done in 20 minutes but I keep second guessing myself. Anyone know what flare to use hooking up new hardline to the master cylinder. I will not be using stainless steel. Just confused because I know it has metric nuts to take the pipe lose. Any suggestions on my late night, thinking. Its really hard to tell what type of flare I need. Help please. It is a 1991 s10 long bed