Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TT3-H51 found under Coupling Torque by Zero Max Inc. The National Stock Number assigned to this part is 5990012401100, and the Federal Supply Class is 5990 Synchros And Resolvers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TT3-H51.