[Shop-talk] retapping a hole

[Eric Russell]

Make sure it is 1/4-20 and not metric. (since it is likely to have been
made you know where...)

EjR

On Tue, Jan 17, 2023 at 10:55 PM john <jniolon at att.net> wrote:

> Pat is correct .  It is a stud with a ball mount attached to the mirror
> (to allow swivel)  the other end is a 1/4-20 stud that
> screws into the mirror base mount... Sooooo I have to re-thread the mount
> from 1/4-28 to 1/4-20
>
> j
>
>
> *----- Original Message -----*
> *From:* Pat Horne <patintexas at icloud.com>
> *To:* Jack Brooks <JIBrooks at live.com>
> *Cc:* john <jniolon at att.net>, shop-talk <shop-talk at autox.team.net>
> *Sent:* 1/17/2023 8:29:26 PM
> *Subject:* Re: [Shop-talk] retapping a hole
> ------------------------------
> It isn’t just a bolt, but a stud in the back of the mirror- as I
> understand it.
>
> Peace,
> Pat
>
> Pat Horne
> We support Habitat for Humanity
>
>
> On Jan 17, 2023, at 8:16 PM, Jack Brooks <JIBrooks at live.com> wrote:
>
> 
>
> I guess I am confused.  While I only use Home Depot hardware as a last
> resort, even they have ¼-28 bolts in a variety of heads and finishes.  Why
> work hard to make a ¼-20 fit, when ¼-28 hardware is available?
>
> Jack
>
>
>
> *From:* Shop-talk <shop-talk-bounces at autox.team.net> *On Behalf Of *john
> *Sent:* Sunday, January 15, 2023 7:38 AM
> *To:* shop-talk <shop-talk at autox.team.net>
> *Subject:* [Shop-talk] retapping a hole
>
>
>
> I have a mirror mount on my truck door that held a rear view mirror.
> Unfortunately the mirror decided it didn't want to stay with my truck.
>
> So, I'm looking for a replacement. The mount is drilled and tapped for
> 1/4"-28 threads and most of what I find is 1/4-20.  I'm wondering if I can
>
> re-tap the metal over existing threads with a 1/4-20 thread and it will
> hold...or will I just make a mess of it and make it broke. The drill side
> for the
>
> two thread sizes are within a 64th or so of being the same and the mount
> is 7/16" or so wide so I have some meat to play with...
>
>
>
> suggestions?
>
>
>
> john
>
>
>
> <image001.jpg>
>
>
>
>
> another option... drill completely thru mount and find a mirror with a
> stud long enough to pass thru completely
>
> and secure with an acorn nut (or something)  at the back side of the mount
>
>
>
> <image002.jpg>
>
>
>
> another caveat... I don't want to remove the mounts from the door...
> involves removing windows and regulators
>
> to get to the internal nuts.
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-- 
Eric Russell
Mebane, NC
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