Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 135DA-6 found under Roller Assembly by Insinger Machine Company The. The National Stock Number assigned to this part is 3020011978970, 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 135DA-6.