Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 71B40-277 446-PP found under Filter Band Pass by K And L Microwave Inc. The National Stock Number assigned to this part is 5915012761160, 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 71B40-277 446-PP.