Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F54A20 found under Regulator Fuel Pressure by Surface Combustion Inc. The National Stock Number assigned to this part is 1660003326393, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F54A20.