Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S1MBB18115 found under Gear Assembly Speed Decreaser by Joyce Telectronics Corp. The National Stock Number assigned to this part is 3010016063142, 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 S1MBB18115.