ProLine 3/8-in x 1/2-in Threaded Flare x Fip Adapter Coupling Fitting in the Brass Fittings department at Lowes.com
Derale Performance Adapter Fitting Straight 5/16" Inverted Flare Male and Female to 5/16" Hose Barb Brass - Natural
Amazon.com: AIVS 4 Pieces 6014 Vacuum Pump Adapter 1/4 Inch Flare Female to 1/2 Inch Male and 6015 R134A Brass Refrigerant Tank Adapter to R12 Fitting Adapter 1/2" Female to 1/4" Male
Amazon.com: 4 Pieces 6015 R134A Brass Refrigerant Tank Adapter to R12 Fitting Adapter 1/2 Female Acme to 1/4 Male Flare Adaptor Valve Core and 6014 Vacuum Pump Adapter 1/4 Inch Flare Female
3/8" NPT Male To 5/16" Inverted Flare Female Adapter Fitting - BF56 - Affordable Street Rods
1/4" MNPT x female 1/4" inverted flare adapter - propanegear
Flare Fittings
Dormont 90-3031R Gas Adapter Fitting 5/8-Inch OD Flare by 1/2-Inch Male, Brass flare adapter for use with 5/8 inch OD gas range connectors By Watts - Walmart.com