Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XM204 23411 OXYGEN CLEAN found under Repair Kit Valve by Rix Industries. The National Stock Number assigned to this part is 4820016682189, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like XM204 23411 OXYGEN CLEAN.