Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6429340-00 found under Block Assembly Hoist by Duffnorton Co Inc. The National Stock Number assigned to this part is 3950011668305, and the Federal Supply Class is 3950 Winches Hoists Cranes And Derricks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6429340-00.