Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 66J40230-16 found under Duct Assy Welded by San Antonio Air Logistics Center. The National Stock Number assigned to this part is 4710004889491, and the Federal Supply Class is 4710 Pipe Tube And Rigid Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 66J40230-16.