Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC00143-9873-10 found under Metoprolol Tartrate by West Ward Pharmaceutical Corp. The National Stock Number assigned to this part is 6505016151537, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NDC00143-9873-10.