Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC51079-0322-20 found under Propoxyphene Napsylate And Acetaminophen Tablets U by Mylan Institutional Llc. The National Stock Number assigned to this part is 6505001118373, 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 NDC51079-0322-20.