These metric nuts have a barrel with multiple threads for secure thread engagement. Also known as U-style clip-on nuts.

Also known as U-nuts, these nuts squeeze both sides of thin panels for a tighter grip than J-nuts.

A hex-shaped barrel allows these clip-on nuts to be gripped with a wrench to hold them in place when tightening a screw. They have multiple threads for more thread engagement than low-profile clip-on nuts.

For a stronger grip than J-nuts, these nuts—also known as U-nuts—firmly squeeze thin panels from both sides. Use them as a fastening point for tapping screws.