Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS2066K4 found under Chain Roller by Rexnord Industries Inc Div Link. The National Stock Number assigned to this part is 3020005091990, 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 SS2066K4.