Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 517400-11 found under Air Conditioner by Rbc Transport Dynamics Corp Div. The National Stock Number assigned to this part is 4120001119388, and the Federal Supply Class is 4120 Air Conditioning Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 517400-11.