Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2503056019 PART 9730 found under Nut Spacer Plate by R And M Materials Handling Inc. The National Stock Number assigned to this part is 5310012292006, 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 2503056019 PART 9730.