Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RW3 820497-1 found under Guard Coupling by David Brown Gear Systems Limited. The National Stock Number assigned to this part is 3010011954264, 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 RW3 820497-1.