Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F400B442 found under Gasket Set by Blue Tee Corp. The National Stock Number assigned to this part is 5330003582569, 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 F400B442.