| 49,19 sec Outdoor | Sem Verwey Jongens U18 | 2016-07-03 | |
|---|---|---|---|
| 49,80 sec Outdoor | Sem Verwey Jongens U18 | 2016-05-29 | |
| 50,8 sec* Outdoor | Bart van der Gragt Jongens U18 | 2003-05-11 Heerhugowaard | |
| 52,50 sec Outdoor | Bart van der Gragt Jongens U18 | 2002-08-11 | |
| 52,9 sec* Outdoor | Silvester Stam Jongens U18 | 1993-05-22 |