Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 53G970503-3 found under Packing Preformed by Hoosier Industrial Supply Inc. The National Stock Number assigned to this part is 5330002403535, 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 53G970503-3.