Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KF357A found under Crystal Unit Quartz by S E Associates Ltd Partnership. The National Stock Number assigned to this part is 5955014419838, 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 KF357A.