Over the years I have received a number of phone calls from customers wondering how to secure the end cap inside their piece of bar foot rail tubing.
The internally fitting end caps are intended to fit loosely inside tubing when it is initially assembled. The reasoning here is to allow room for error during the manufacturer production process, and also so these internal fittings can fit tubing of different diameters.
Drill through the rail using a small set screw to secure the fitting.
Option 2: (This is the method that I recommend. I find it easier and more effective.)
All you need is masking tape. Simply wrap the stem of the end cap with masking tape several times. Then, just slide the end cap (with masking tape wrap) into the rail. This will provide a more snug fit, without the hassle of pulling out the drill and putting holes in your bar rail. This method also makes it easy to remove your end caps without having to worry about taking a screw out and risk scratching the finish on the bar rail.
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