Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC51079-0322-21 found under Propoxyphene Napsyl by Mylan Institutional Llc. The National Stock Number assigned to this part is 6505010402286, 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 NDC51079-0322-21.