Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XB1019FW551A found under Control Assembly Expansion Valve by Air Conditioning Suppliers Inc. The National Stock Number assigned to this part is 4130007630712, 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 XB1019FW551A.