Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 75C40A40MS found under Motor Generator by Georator Corporation The. The National Stock Number assigned to this part is 6125000613090, and the Federal Supply Class is 6125 Converters Electrical Rotating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 75C40A40MS.