Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 973-500-000-0 found under by Wabco Automotive U K Limited. The National Stock Number assigned to this part is 4820121525413, 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 973-500-000-0.