Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS-63TS8ITEM17 found under Ball Valve Ported by Whitey Co. The National Stock Number assigned to this part is 4820012905691, 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 SS-63TS8ITEM17.