| 49,19 sec Outdoor | Sem Verwey Jongens U20 | 2016-07-03 | |
|---|---|---|---|
| 49,80 sec Outdoor | Sem Verwey Jongens U20 | 2016-05-29 | |
| 50,28 sec Outdoor | Jeroen Swinkels Jongens U20 | 2016-05-27 Hoorn | |
| 50,8 sec* Outdoor | Bart van der Gragt Jongens U20 | 2003-05-11 Heerhugowaard | |
| 51,58 sec Outdoor | Bram Westland Jongens U20 | 2002-08-12 | |
| 52,0 sec Outdoor | Bram Westland Jongens U20 | 2002-05-25 | |
| 52,78 sec Outdoor | Marcel de Jong Jongens U20 | 1997-06-22 | |
| 53,4 sec* Outdoor | Marcel de Jong Jongens U20 | 1997-06-13 Heerhugowaard | |
| 53,8 sec* Outdoor | Marcel de Jong Jongens U20 | 1997-05-11 | |
| 54,7 sec* Outdoor | Marcel Dommisse Jongens U20 | 1993-05-16 |