Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NB253-772A found under Network Pulse Forming by Bycap Inc. The National Stock Number assigned to this part is 5915005674599, 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 NB253-772A.