Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SK 5533 4 24 1 4 found under Cap Valve by Aai Corporation. The National Stock Number assigned to this part is 4820015627619, 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 SK 5533 4 24 1 4.