Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F3181-06 found under Oscillator Noncrystal Controlled by Zarlink Semiconductor. The National Stock Number assigned to this part is 5955004513933, 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 F3181-06.