Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5B6390 found under Link Roller Chain by William Adams Pty Ltd. The National Stock Number assigned to this part is 3020000119685, 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 5B6390.