Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 253204 found under Coupling Shaft Flex by Rexnord Llc Div Falk Gear Group. The National Stock Number assigned to this part is 3010013417145, 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 253204.