Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number Z7D85 found under Gear Antibacklash S by Designatronics Incorporated. The National Stock Number assigned to this part is 3020004370309, 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 Z7D85.