Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GFK-40 found under Coupling Wheel Winch by Marine Equipment Inc. The National Stock Number assigned to this part is 3950014374759, 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 GFK-40.