Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CK35PR found under Case Crystal Unit by Joint Electronics Type Designation. The National Stock Number assigned to this part is 5955009309140, 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 CK35PR.