Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BCC54 59 found under Finger Adapter Filter by Microlab Fxr. The National Stock Number assigned to this part is 5915004703439, and the Federal Supply Class is 5915 Filters And Networks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BCC54 59.