Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CCL-6-6-000A55FB found under by Cal Crystal Lab Inc. The National Stock Number assigned to this part is 5955016830649, 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 CCL-6-6-000A55FB.