Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C0231T4Y2-88MHZ found under Oscillator Crystal Controlled by Otis Elevator Co. The National Stock Number assigned to this part is 5955011268959, 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 C0231T4Y2-88MHZ.