On 5/23/2019 4:09 PM, John B. Slocomb wrote:
On Thu, 23 May 2019 06:58:59 -0700, sms
wrote:

On 5/23/2019 3:45 AM, John B. Slocomb wrote:

snip.

Goodness. Here is a thing that is literally riveted (which is why it
is called a "riv(et) nut") into the bike frame. You don't think it
will be water proof?

Rivnuts routinely become loose, even when installed at the factory. Some
sort of sealant, or paint, should be used to fill the gaps that will exist.

Hmm... I would suggest that you simply don't know what you are talking
about as I've worked on DC-3's that wee originally built in the 1930's
and there was no evidence of the de-icer boots, held on by rivnuts,
coming loose.

Geez, just read various forums about Rivnuts on coming loose and
spinning. Or rattling. It's extremely common. This is unrelated to 1930
prop planes.

Regarding improperly drilled holes, as Mike Jacubowsky, owner of Chain
Reaction Bicycles in Redwood City, CA stated: "Of course, if you're not
careful with the rivnut installion (for example, a jagged-edged hole),
this too can cause frame failure" but he was referring to thin-wall
steel tubes. I suppose that one advantage of aluminum frames is that the
tubes have to be thicker to compensate for the lower strength of aluminum.