Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 49740K4 found under Seal Plain by Hayes Dana Ltd Corporate Offices. The National Stock Number assigned to this part is 5330000474042, 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 49740K4.