Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 283550-1945 found under Chain Roller by Atlantic Inertial Systems Inc. The National Stock Number assigned to this part is 3020010920338, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 283550-1945.