Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 209-030-583-53 found under Seal Nonmetallic Sp by Rotair Industries Inc. The National Stock Number assigned to this part is 5330011430615, 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 209-030-583-53.