Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4R33A found under Head by Thermo King Corp. The National Stock Number assigned to this part is 4130003596298, 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 4R33A.