Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 820056 found under Seal Plain Encased by Illinois Auto Electric Co. The National Stock Number assigned to this part is 5330015669176, 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 820056.