Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 104-500 found under Oscillator Crystal by L 3 Communications Microdyne. The National Stock Number assigned to this part is 5963013701997, and the Federal Supply Class is 5963 Electronic Modules. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 104-500.