Midland10-462 Brass SAE 45 Degree Flare Reducer, 1/4" Male Flare x 3/8" Female Flare Thread, 0.81" Hex Size

Midland 10-462 Brass SAE 45 Degree Flare Reducer, 1/4" Male x 3/8" Female Thread, 0.81" Hex Size

Anderson Metals 54014-04 Brass Tube Fitting, Short Flare Nut, 1/4" Tube OD, Copper

FASPARTS Bulkhead SAE 45 3/8 Tube OD