Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ZD73X5-8 found under Pulley Awning by Sargent And Co. The National Stock Number assigned to this part is 3940008015136, and the Federal Supply Class is 3940 Blocks Tackle Rigging And Slings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ZD73X5-8.