Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CR83U84-450000MHZ found under Crystal Unit Quartz by Leigh Instruments Ltd. The National Stock Number assigned to this part is 5955000013329, 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 CR83U84-450000MHZ.