Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0018-1331-600 found under Valve Globe by Westfalia Separator Mineraloil. The National Stock Number assigned to this part is 4820012852615, 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 0018-1331-600.