Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PCRO-72XX found under Oscillator Noncryst by Herley Industries Inc. The National Stock Number assigned to this part is 5955015037271, 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 PCRO-72XX.