Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F72903-1PC527572 found under Diaphragm Follower by Westinghouse Air Brake Technologies. The National Stock Number assigned to this part is 2240003662390, and the Federal Supply Class is 2240 Locomotive And Rail Car Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F72903-1PC527572.