Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 150 021 73B1 2 found under Sheet Metal by Bell Helicopter Textron Inc. The National Stock Number assigned to this part is 9515014959640, and the Federal Supply Class is 9515 Plate Sheet Strip Foil And Leaf. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 150 021 73B1 2.