Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 49840-001 found under Filter Band Pass by Crystal Sokol Products Inc. The National Stock Number assigned to this part is 5915011359846, 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 49840-001.