Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC16252-0591-99 found under Sumatriptan Succina by Watson Labs Inc. The National Stock Number assigned to this part is 6505014562497, 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 NDC16252-0591-99.