Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number OSS227501 found under Disk Valve by Albany Engineering Co Ltd. The National Stock Number assigned to this part is 4820996104342, 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 OSS227501.