NPT does not have the capability to handle the high pressures of a brake system. you can use banjo fittings to adapt to a flare fitting, and do it that way.

remember that if you are installing SS lines on a street car, they MUST have the DOT plastic whip sleeve on them, or they do not pass inspection. most of them will come wiht a fitting that bolts to the caliper with a banjo fitting and the hose flares to it.