Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CB57-42185PIECE25 found under Seal Plain Encased by Aai Corporation. The National Stock Number assigned to this part is 5330010140301, 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 CB57-42185PIECE25.