Updated Extension Anti-Spin Lug Stud Fitting,L Track and Airline Track Stud Fitting,2250 Lbs Capacity,45mm length-10pack

The flange that goes in the track doesn't seem big enough. It holds but I am not going to trust it with much. Maybe it's my track but another set of hardware I bought for my track fits well.

These are worse than worthless. The square part of the carriage bolt is too small - so when you install in an L track the bolt just spins around. This is worse than worthless because you can get one installed and then due to the spinning bolt - you can't unscrew it! Total garbage. Do NOT BUY!!

I really wish these things worked. It bugs me so much when you are in a major time crunch on a project or a job and you are really counting on something to work.Huge fundamental design issue with these.The tragedy of these studs is that there is no way to fully tighten the nuts once they are installed on a track, as the bolts will spin freely no matter what you do.The reason for this, is that the square portion at the base of the bolt is not long enough to reach the area where it is supposed to lock in place on the winglets that locate the stud on the l-track.Sounds complicated, but if you are unlucky enough to get hands-on with these, you'll see how a few more millimeters of metal in the right place would have solved this issue completely.Also, huge fail on the quality of machining, every other nut requires a ton of force to get it to thread.Just get something else!

These are cheap knock-offs that do not fit in a standard L-track. They will spin in the track as there is no square base on bolt. The threads are not clean and would need to be chased. The stamped metal hold down is 1/2 the thickness of a standard l-track bolt. Big safety concern if you could even get them tight. Do not buy.

Worked in our van to make everything removable if desired. Like them and would buy again. Pricey

Worked fine.