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Like Sam and Skip say, cap or acorn nuts and I would definitely use a washer too.

-Hal


CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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What I'm looking for has a 2-1/8" round mushroom that only protrudes from the wall's surface about 1/4" total. It looks like the head of a carriage bolt, only much larger in diameter in order to spread the holding power over a larger area. There are pictures of them in the BSP for coin phone installation, but I can't get a picture on here.

Acorn nuts, etc. protrude too far out and there is an issue with appearance once a nut and washer are used. If all else fails, we may just have to go the route of long carriage bolts.


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Ed, if you have to, get a die set and cut threads onto long, unthreaded rod. I've done that before.

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Are the heads on these still too small for you?

Elavator Bolts

Or are you looking for a nut with rounded (mushroom) head?

Last edited by Mercenary Roadie; 02/22/17 08:33 PM.

Patrick T. Caezza
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These are closer, but still not it. The rod part needs to be 12" long, and yes, the head needs to be rounded. The ideal solution is for the nut to have a female threaded entry so that variable length threaded rod can be used.


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I think this is what Ed is talking about. I found it at the bar I work at. It was through a brick wall but is otherwise unused.

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This particular one looks to be 5/16 thread, the cap is 2-1/2" across and it only sits 1/4 to 3/8 inch proud of the wall.

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Ya know, something like that would be a simple thing for a welding shop to make up. Threaded rod welded to a disc. Krylon rattle can paint to match the wall. Easy peasy.

Don't forget that there are double-female threaded rod couplers. You could cut the "stem" of our mushroom back inside the wall, screw on a coupler with perhaps a jam nut then use a regular bolt on the TV mount side. But if looks on that side aren't important just hang the mount on the threaded rod protruding from the wall, sock it up with a nut and washer then cut the excess length.

-Hal


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What does it look like where the threads meet the cap?


Patrick T. Caezza
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Welded I'm sure. Definitely two pieces.

-Hal


CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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