Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NDC00406-8642-03 found under Urea Usp by Mallinc Krodt Inc. The National Stock Number assigned to this part is 6505005607204, 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 NDC00406-8642-03.