As above, what is the correct method for fitting rivnuts?

1. Drill hole to suit rivnut. Must be fairly tight, but not interference fit.

2. Screw rivnut onto tool

3. Insert into hole

4. Rivet the nut into the hole as you would with a rivet. - THERE SHOULD BE NO BREAKING OFF OF ANY PARTS THOUGH.

When you get to a reasonable amount of pressure where the rivnut doesnt move any more, unscrew the tool, and hey presto.

be carefull with small(m3,m4.m5) aluminium rivnuts it is very easy to pull the threads out of them .m.

I'd give them a covering of epoxy too - helps keep them where they are supposed to be (stops them spinning) and also helps combat some of the unlike-metal issues.

I'd add one step between 1 & 2

1.5 Deburr the hole you've just drilled.

You can't always get to the back though, but do the best you can.

cheers gents, I've been a bit anal by putting silkaflex in all of my rivet holes for the cable bases so i'll use that too for the rivnuts.

Not anther step but if the fitting will be used regulary consider using steel instead of alloy. Harder to set the bigger they are but I've not pulled any threads out yet. I've stripped threads though with repeated use of the rivnut when in situ.

I have gone on to using countersunk steel rivnuts, as easy to set as ally and flush with the surface, I always put a drop of bearing lock on the rivnut.

..... buy exactly the right sized drill bits.

The hole sizes are all non-standard sizes. From memeory M5 is 7.2mm and M6 is 9.6mm.

If you try to get away with using the nearest standard drill bit set size the nutsert will spin and you cannot re-drill an oversized hole.

At work we use steel rivnuts 8mm up and we make a tube with a handle welded to the tube then the right size bolt ie 8mm though the tube screw the rivnut on it then use a air socket gun