Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U74LS00 found under Microcircuit Digital by Drs Tactical Systems Ltd. The National Stock Number assigned to this part is 5962010041272, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like U74LS00.