They are available in male or female ends for 3/8" tubing. Compression style fitting. just slide tubing into tube nut, install the ferrule, and attach tube end. Easily connect tubing to AN fittings;.
3-Way Y-Block Fitting Adapter AN6 6AN Male to 2X AN6 6AN Male BLACK
-6AN Male to -6AN Male Thread Straight Aluminum Anodized Fitting Adapter Red
-6AN Male to 6AN Male 45° Degree Flare Swivel Aluminum Fitting Adapter Black
6AN NITROUS OXIDE BOTTLE GAUGE FITTING BLUE 6AN MALE TO 6AN FEMALE 1/8 NPT PORT
6AN Male to 6AN Female Swivel Adapter 90 Degree Full Flow Fitting Coupler 2Pcs
LokoCar 90 Degree 6AN Male to 6AN Female Swivel Full Flow Fitting Aluminum 2Pcs
