Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MLL 4004 found under Semiconductor Devic by Hewlett Packard Co. The National Stock Number assigned to this part is 5961013924837, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MLL 4004.