Explorer crown numbers

[Gabus]

What's the difference between 24-600-0 and 24-603-0 that are 6mm. Which one should I order for a Explorer I? What is the matching tube number? Cheap unknown source, 21J powered ( I think ).

[freddy333]

The difference relates to the diameter thickness of the center tube in the crown (the part the stem screws into). If I remember correctly, the 603's tube is slightly smaller.

24-600 uses 24-6020 tube

24-603 uses 24-5330 tube

On a related note, those of you who have been following the Triplock: crimped (703) vs solid (704) mystery, I think I may have solved it.