Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GS66658REVA found under Oscillator Crystal Controlled by Lucent Technologies Inc. The National Stock Number assigned to this part is 5963000157420, 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 GS66658REVA.