Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SW91-3 found under Torque Converter Nonvehicular by Unex Corporation. The National Stock Number assigned to this part is 3010013876689, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SW91-3.