Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 639 40 AA C0 1MC found under Socket Plug In Elec by Cooper Crouse Hinds Llc. The National Stock Number assigned to this part is 5935014847415, 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 639 40 AA C0 1MC.