Don't mess around with more connections to cause leaks, I use the correct fittings and AN flaring tool! The D suffix means aluminum. Just delete the D for steel. Parker sells steel one under the JIC standard.
AN815-8D
AN818-8D
AN819-8D
and a rotoflare!

after reading your post, the half inch hard line would be severely restricted with -6 hose, you would want -8

212FB.jpgAN815C.jpgAN818C.jpgAN819C.jpg
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!