Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P90073-4 FIND NO 82.6 found under Retainerseatvalve by Lexair Intl Corp. The National Stock Number assigned to this part is 4820016811877, 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 P90073-4 FIND NO 82.6.