Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2057 found under Dummy Connector Plu by Quincy Compressor Division Of Coltec. The National Stock Number assigned to this part is 5935016444153, 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 2057.