https://www.svpu.com/product-page/2009-2020-ford-f-150-mark-lt-running-board-nut-spring-w707369-s439
2009-2020 Ford F-150/Mark LT running board nut spring- W707369-S439 | svpu
2009-2020 F-150 and Mark LT M10.3x6mm Running board nut spring. Part number W707369-S439. Sold individually.