Brass

3/8" (16-1.5mm) Brass GM Fuel Line Nut SFL-6-16MM

Fairview General Catalog

5/16" (14-1.5mm) Brass GM Fuel Line Nut SFL-5-14MM

Fairview General Catalog

1/2" (3/4"-18) Brass Male 45° SAE Inverted Flare Nut 141-8

Click this link to view a helpful CGA gas fitting reference chart Fairview General Catalog

3/8" (5/8"-18) Brass Male 45° SAE Inverted Flare Nut 141-6

Click this link to view a helpful CGA gas fitting reference chart Fairview General Catalog

5/16" (1/2"-20) Brass Male 45° SAE Inverted Flare Nut 141-5

Click this link to view a helpful CGA gas fitting reference chart Fairview General Catalog

1/4" (7/16"-24) Brass Male 45° SAE Inverted Flare Nut 141-4

Click this link to view a helpful CGA gas fitting reference chart Fairview General Catalog

3/16" (3/8"-24) Brass Male 45° SAE Inverted Flare Nut 141-3

Click this link to view a helpful CGA gas fitting reference chart Fairview General Catalog