Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RM440 found under Nut Stamped by Trw Assemblies And Fasteners Group. The National Stock Number assigned to this part is 5310000584241, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RM440.