Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 300-3 4X3 16X1-7 16X3 8 found under Coupling Shaft Flexible by Magnaloy Coupling Co Div Of. The National Stock Number assigned to this part is 3010012700907, 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 300-3 4X3 16X1-7 16X3 8.