Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number Z6D144A found under Gear Antibacklash Spur by Designatronics Incorporated. The National Stock Number assigned to this part is 3020001888283, 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 Z6D144A.