Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 550518 found under Brake And Clutch Assembly Winch by Eone Inc. The National Stock Number assigned to this part is 3950015196684, 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 550518.