Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RC6018 RB found under Coupling Shaft Flexible by F M C Corp. The National Stock Number assigned to this part is 3010001220879, 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 RC6018 RB.