Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1997478 found under Regulator Unloader by Chrysler Corp. The National Stock Number assigned to this part is 4130000035313, 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 1997478.