Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4399B85-1 found under Connector Plug Elec by Sundstrand International Corporation. The National Stock Number assigned to this part is 5935013458573, 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 4399B85-1.