Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number G30X40X4 found under Seal Plain by Ina Bearing Co Inc. The National Stock Number assigned to this part is 5330012727455, 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 G30X40X4.