Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4A161 found under Socket Plug In Electronic Compon by Grainger Div Of W W Grainger Inc. The National Stock Number assigned to this part is 5935014473791, 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 4A161.