Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2521 2161-120 found under Adapter Connector by Bae Systems Hagglunds Ab. The National Stock Number assigned to this part is 5935014985759, and the Federal Supply Class is 5935 Connectors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2521 2161-120.