Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9HD522 found under Parts Kit Ball Valv by Oshkosh Corporation. The National Stock Number assigned to this part is 4820014359500, 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 9HD522.