Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 490 00002 00 found under Oscillator Crystal by Rycom Instruments. The National Stock Number assigned to this part is 5955012822011, and the Federal Supply Class is 5955 Oscillators And Piezoelectric Crystals. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 490 00002 00.