Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X3MC10-640 55-XP found under Filter Band Pass by K And L Microwave Inc. The National Stock Number assigned to this part is 5915010875548, 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 X3MC10-640 55-XP.