Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XV502SS-12 found under Valve Ball by Parker Hannifin Corporation. The National Stock Number assigned to this part is 4820016567179, 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 XV502SS-12.