Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2057S-39-9S-3-001 found under Connector Set Elect by Amphenol Optimize Manufacturing Co. The National Stock Number assigned to this part is 5935011907058, 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 2057S-39-9S-3-001.