Okay. The line nuts again.
I just went around the 40 and tested the Stepped Nut VS the Full Thread Nut in each hole. Here's what I found:
Both worked.
Both secured the line.
The Stepped Nut had a consistent two fewer threads in each hole.
MC: ST Nut = 5 threads FT Nut = 7 threads
Rear Wheel Cyl: ST Nut = 4 threads FT Nut = 6 threads
Axle housing fitting: ST Nut = 5 threads FT Nut = 7 threads
Frame Rail fittings: ST Nut = 6 threads FT Nut = 8 threads
I personally like the wider 45* flare, the extra threads connecting, and the shorter leftover of the nut outside the hole.
AND. And I mean a big AND, the stepped nuts cost almost double what the others cost. That adds about $20 to a kit.
As some of you have stated that you want the stepped nut, fine. I have no problem with that.
Just remember, don't over torque a brake line nut. Having the most threads engaged possible makes that harder to over do. Just because I like analogies, consider this; Grab onto a chin-up bar with all eight fingers and thumbs. Hang on for a while. Now try the same thing for the same amount of time with only two fingers per hand. How long will you last?