Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RSN4-0050-1AA404 found under Compressor Unit Refrigeration by Copeland Corp. The National Stock Number assigned to this part is 4130001059799, and the Federal Supply Class is 4130 Refrigeration And Air Conditioning Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RSN4-0050-1AA404.