Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EM8013-9 found under Rotor Tach Transduc by Western Sky Industries Llc. The National Stock Number assigned to this part is 1680015630792, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EM8013-9.