400 meter Jongens B finale ; Official result
| Pl. | Laan | Nr | Naam | PR | Vereniging | Cat | Resultaat | Info |
| 1 | 5 | 482 | SPIERENBURG Arend-Jan | 50.71 | Cialfo | Jun | 50.74 | |
| 2 | 6 | 218 | HUIJSMANS Roel | 51.95 | Flevo Delta | Jun | 50.76 | |
| 3 | 3 | 226 | JANGA Serapis | 52.28 | Rotterdam Atletiek | Jun | 51.27 | |
| 4 | 4 | 59 | BOUMAN Bastiaan | 52.33 | Trias | Jun | 52.34 | |
| 5 | 2 | 280 | KOPPEL Christian van de | 53.03 | HAC | Jun | 53.78 | |
| 1 | 277 | KOOIJMANS Max | 52.33 | Achilles | Jun | DNF |