The answer is "Yes"! I had them in stock when I had my cycle shops in N.H. I finally stopped stocking them because there wasn't much demand for them! A 1/4" clamp has threads all of the way to the base. All you have to do is-Tighten it-roll the end over with needle nose pliers & if desired clip the excess off.
Irish
P.S. I know that it works because ALL I ever used on fuel lines was 1/4"!