Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number I9171 found under Retainer Packing by Vibratech Inc. The National Stock Number assigned to this part is 5330004741209, 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 I9171.