Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC52544-0291-28 found under Levonorgestrel And by Actavis Pharma Inc. The National Stock Number assigned to this part is 6505012240176, 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 NDC52544-0291-28.