It might be a good idea to angle the horizontal ledges of the steps on the T nuts so the outer edges are slightly higher. It might be a good idea to put a slight angle on the top of the T section so that it puts more pressure on the T-slot inside edges where it is stronger and have less tendency to break the edges.Paul, if I may I read this as Aluminum t-nuts are fine in many uses, but they may slip due to their ability to deform more easily if you are using a two piece clamping system like a split vise.I consider aluminum t-nuts for proof of concept or single use applications, because they are so quickly and easily made. When that happens you're actually jacking the lips of the t-slot up, and you could break the table.Ģ. A lot of commercial t-nuts do not finish the final thread on the bottom to prevent you from accidentally screwing into the table on the bottom of the t-slot accidentally with an over length bolt or prevent a stud from screwing in to far. Know if you plan to make through tapped or 'stop' tapped.

There is nothing special about t-nuts and they do not have to be particularly precise or accurate. When I make t-nuts I start by making a stepped bar, and then just saw cutting them apart (after tapping) anyway.

For single or limited use applications even aluminum bar stock will work for t-nuts or t-nut bars.

Homemade t slot bolt