Ortlieb QL2.1 nut

• this GitHub repo has a model of the nut but I was unsatisfied with it
• replacement for Ortlieb part number E205
• the original one broke for me after my pannier fell off my bike
• the original features 2 spots to put 4 mm hex key to prevent rotation while you fasten a thread forming screw into it
• I changed mine to use a 13 mm socket which is much better since you can center the nut & apply pressure at the same time, unlike the original
• the ID is sized to take the thread forming screw
• pictures show original part in context

2023-08-27 update

Rev 7

• 2023-08-27: added rev 7, which uses M4 bolt instead of the original thread forming screw for which I cannot find COTS except through Ortlieb

Improvements over original

Ortlieb's original requires 4 mm hex key to immobilize the nut while it's being screwed in from the other side:

Mine uses a centrally located socket, which also can apply pressure to force engagement with the fastener which you cannot do with the original.

The downside is that the stack height is a few mm above the original & a bit more intrusive on cargo inside the pannier.

The original thread forming screw from Ortlieb seems to fall out forever more once it falls out once. I think the thread in the nut gets worn out. Here is a picture of the original Torx drive fastener before I lost it:

I lost it entirely on the road, & needed to replace it with this M4 nylock (so that it doesn't loosen under vibration)nut & bolt:

Here is the bolt:

Category: Replacement Parts