Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CAT 18 33 31 A POS 212 found under Gasket by Clorius Controls A S. The National Stock Number assigned to this part is 5330222690751, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CAT 18 33 31 A POS 212.