Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 916 44 6 937 found under Back Up Ring Preformed Packing by Columbus Jack Corporation. The National Stock Number assigned to this part is 5330016602051, 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 916 44 6 937.