Yep, 1/4" -20 it is.

I'm pulling down my cabinets to wire a new AC unit to the front hole. The last time the cabinets came down, I realized 2 of the bolts, one in each cabinet, was not pulling tight. I want to pop in some rivnuts and I think I need 1/4"-14 but can't seem to find that size anywhere. Anybody know off the top of their heads the correct rivnut size? Otherwise I guess I'll just pick up new bolts to match 1/4"-20 which seems a common size.

jknezek wrote on Tue, 12 June 2018 11:03

I'm pulling down my cabinets to wire a new AC unit to the front hole. The last time the cabinets came down, I realized 2 of the bolts, one in each cabinet, was not pulling tight. I want to pop in some rivnuts and I think I need 1/4"-14 but can't seem to find that size anywhere. Anybody know off the top of their heads the correct rivnut size? Otherwise I guess I'll just pick up new bolts to match 1/4"-20 which seems a common size.

Jeremy,

Replacing rivnuts is usually a bear. They don't like to be removed, but!!!
It seems that they get loose with vibration.
They can often be re-tightened.

You need a screw (bolt) with a lot of thread, a spacer to get clear of the ceiling, a washer and another 1/4-20 nut.
If you can get hardware that is Grade 8, get that.
Put some good grease on the washer and the threads of the long screw.
Put the nut, washer and spacer on the long screw so that there is at least 1/2" of thread open.
Now, thread that all into the overhead rivnut.
Holding the head of the long screw, wrench the nut down until the whole thing gets solid.

I've actually done this more than a few times, but my 73 has self drill screws for the overhead stuff.

Matt

Jeremy,

1/4"-14 is a self-tapping screw size; I'm sure you don't want that.
1/4"-20 is much more likely for those machine screws -- or 1/4"-28 if
they're National Fine threads (unlikely).

Ken H.


On Tue, Jun 12, 2018 at 11:12 AM Jeremy wrote:

> I'm pulling down my cabinets to wire a new AC unit to the front hole. The
> last time the cabinets came down, I realized 2 of the bolts, one in each
> cabinet, was not pulling tight. I want to pop in some rivnuts and I think
> I need 1/4"-14 but can't seem to find that size anywhere. Anybody know off
> the top of their heads the correct rivnut size? Otherwise I guess I'll
> just pick up new bolts to match 1/4"-20 which seems a common size.
> --
> Thanks,
> Jeremy Knezek
> 1976 Glenbrook
> Birmingham, AL
>
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