904 trans cooler line fittings

I got extremely tired of trying to make those metal on metal connections leak-free, so I ordered a couple Russell 1/8 to 5/16 n i p p l e fittings from Summit, used a couple short sections of cooler line between the flared end of the steel lines and the new fittings, secured with fuel injection clamps and it's 100 percent leak free now. The part # for the fittings is RUS-697010 $4.97 retail. I've seen some locally but they are a barb and not a n i p p l e.