Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B000-404 23C found under Gasket by Pullman Holt Corp. The National Stock Number assigned to this part is 5330011805529, 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 B000-404 23C.