Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B506M36 found under Tachometer Electric Nonself Gene by E C Schleyer Pump Co Inc. The National Stock Number assigned to this part is 6680001220883, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B506M36.