Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS63TS8ITEM16 found under Stem Fluid Valve by Whitey Co. The National Stock Number assigned to this part is 4820012905685, 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 SS63TS8ITEM16.