Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MBC-19270-283 found under by Van Range Co John. The National Stock Number assigned to this part is 5330014191347, 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 MBC-19270-283.