20 Packs 5/16-18 Threaded Steel Roll in T-Nut with Ball Spring, T Slot Accessories for Aluminum Extrusion Profile Rail

These are excellent for jobs that you decide you want to add an attachment after the profiles are assembled. They are a little fiddly to place and hold while screwing bolt in but work great at a small fraction of the cost of purchased from 80/20.

Product worked exactly how i needed it too. Used to mount my rifle case to my Sherpa roof rack on my 5th gen 4runner. Went off-roading immediately and held up fine. Nothing loosened up. 80 in the hwy was great too

Works great and fit Sherpa roof racks!

Looks and functions just like 8020. Thank you

Worked as described high quality for attaching to roof rack.

I use 10 series from TNUTZ and these so called roll ins neither roll in, or are tight. They are a fit where they touch deal. Sloppy and do not fit the slot properly. I will not buy again. Total rubbish.

Fit perfectly. The spring ball helps hold it in place.

This will not stay in a vertical position as designed. I should have read the reviews. Regretful purchase

Good product