Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C506433-40 506493 found under Tripod Hoisting Unit by Msa Inc. The National Stock Number assigned to this part is 3950013736527, 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 C506433-40 506493.