Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 70S4900 found under Starter Motor Mag L by Westinghouse Electric Corp. The National Stock Number assigned to this part is 2995014924861, and the Federal Supply Class is 2995 Miscellaneous Engine Accessories Aircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 70S4900.