Durable Construction: Heat-treated steel construction features higher corrosion resistance and long life. Multipurpose quick-connect air couplings are used in industrial pneumatic applications to connect air tools and hoses to compressed air supplies Air Coupler and Plug Kit, 3/8 Inch Flow Size, 3/8 Inch FNPT Threads, Air Compressor Accessories Fittings 3/8'' High Flow Air Hose Fittings Set, 3PCS 3/8 UK | Ubuy Heavy Duty Air Fittings Set For Tools PATIKIL 1/4" Air Hose Fittings Set, 300PSI High Flow 1 Pcs Industrial Type Coupler With 1/4" NPT 3/8 NPT Thread Fittings Make sure that the threads you needed is 3/8 Inch NPT threads size. 14-Piece Air Hose Fittings Set with Quick Connect, Nepal | Ubuy 3/8 Inch High Flow Body: This air fittings are intended for high flow air tool, 3/8 inch body provide up to 70% more air flow than 1/4 inch body size. This kit includes 2pc 3/8 body air coupler with 3/8 FNPT threads, 1pc 3/8 body air coupler with 3/8 MNPT threads, 2pc 3/8 body air plug with 3/8 FNPT threads, 4pcs 3/8 body air plug with 3/8 MNPT threads.