Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DH441F-3 found under Insert Flexible Cou by Imo Industries Inc. The National Stock Number assigned to this part is 3010006720391, 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 DH441F-3.