Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A503-1474A found under Nut Plain Hexagon by Thales Optronics Bv. The National Stock Number assigned to this part is 5310121512287, 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 A503-1474A.