1/2-20 Male x 3/8-24 Female Inverted FlareBrass MC Brake Line Adapter

Brass SAE Brake Line adapter 

Male Inverted Flare 3/16" (1/2-20 thread) x Female Inverted Flare 3/16" (3/8-24 thread)

This adapter threads directly onto a SAE 3/16" Inverted Double Flare Nut and adapts it to a SAE 3/16" Inverted Double Flare.

see all my other lines, adapters, brass block and lines at my store  Force 10 Brakes