Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 504 0058 found under Retainer Seal by Bombardier Aerospace. The National Stock Number assigned to this part is 5330012379299, 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 504 0058.