Brass Connector, Female (1/2-20 Inverted), Male (1/4-18 NPT) – AGS Company Automotive Solutions
Brass Pipe Fitting,3/4 Inch NPT Male to 1/2 Inch NPT Female Brass Pipe Hose Tube Fitting Hex Head Bushing Adapter Convert (3, 1/2 NPT female x 3/4 NPT male)
Aluminum Adapter, 1/4" Male NPT to 1/2" Female NPT | Air & Hydraulic Equipment,Inc.
04 (1/4") NPT male to -02 (1/8") NPT female reducer - black - Redhorse Performance
HOME-FLEX 3/4 in. CSST x 1/2 in. NPT Brass Reducing Adapter 11-429-101 - The Home Depot
21MP Sanitary Adapters - 1-1/2" Clamp x 1-1/4" MNPT (304)