Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4999-2111-103 found under Filter Low Pass by Trak Microwave Corporation. The National Stock Number assigned to this part is 5915003410546, 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 4999-2111-103.