Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number REF 3020 PART 7-A found under Nut Plain Hexagon by Kaye And Macdonald Inc. The National Stock Number assigned to this part is 5310013555127, 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 REF 3020 PART 7-A.