Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3343-004 AND 3193-006 found under Disk Valve by Prince Valve Inc. The National Stock Number assigned to this part is 4820012322491, 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 3343-004 AND 3193-006.