Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1063 found under Diaphragm Valve Flat by Westinghouse Air Brake Technologies. The National Stock Number assigned to this part is 4820001274113, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1063.