Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC55253-0073-30 found under Fentanyl Citrate Tr by Watson Labs Inc. The National Stock Number assigned to this part is 6505015789755, 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 NDC55253-0073-30.