In the subsequent picture, start to finish: 12-24, M6, 1/4"- 20. The M6 is the one in particular that I should let anyplace approach my bicycle. The 12-24 will string free into a M6 opening, for example, some bicycle rack supervisors, however it will not hold. A M6 will string a couple of transforms into a 12-24 nut, however extra turns ruin the strings. Same with a 1/4"- 20 and a M6.
