Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P202B27B found under Oscillator Crystal Controlled by Greenray Industries Inc. The National Stock Number assigned to this part is 5955001800936, 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 P202B27B.