Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HELISEP500 HCON0042 found under Gasket by Seimi. The National Stock Number assigned to this part is 5330014400507, 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 HELISEP500 HCON0042.