(Topic ID: 260734)

What is the proper length of early '70s Gottlieb's cabinet bolts?


By swampwiz

4 months ago



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  • 6 posts
  • 5 Pinsiders participating
  • Latest reply 3 months ago by swampwiz
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    #1 4 months ago

    I'm in the midst of replacing all the ugly bolts with pretty new ones, and so I've got a bunch of 3/8"-16 x 3-1/2" bolts that have working everywhere except for some '60s Bally's (which take really short ones), and the early '70s Gottliebs, which seem to take the 3-3/4" ones. And it seems like these 3-3/4" are barely doing the job as they don't seem to stick out past the bottom of the insert. I could get the 4" @ Marco's (it doesn't seem to come in 3-3/4" there), and I am about to do a big order there, so if that's the situation, then great. However, I could get the exact 3-3/4" ones at Fastenal for about the same Marco's but it would actually be more expensive as I would need to pay for shipping there, so Marco's would be the best choice from a cost perspective as the shipping would already be done with the other stuff I'll be getting. I wonder if the 4" bolt could somehow be too long, but I think that there should be enough thread to go all the way down, even if it sticks out an extra 1/4" than then minimal amount it sticks out with the 3-3/4" ones. I'd like to hear from early 70's Gottlieb's owners on this.

    https://www.marcospecialties.com/pinball-parts/4322-01113-64

    https://www.fastenal.com/products/details/91865

    #2 4 months ago

    3-3/4" head bolts seem to tighten to the point were the tip of the bolt protrudes about 1/4" from the bottom of the tee nut. A four inch bolt (which also looks to have 1" of threads cut into it) should have enough threads to protrude the extra 1/4". It *might* be close on tee nuts that have been overtightened and the tee nut is pressed deeper into the cabinet wood.

    There are no clearance issues under the tee nut.

    Why not pick up the correct sized bolts at Home Depot/Ace/Lowes?

    #3 4 months ago

    To be clear you are talking about head bolts, not leg bolts?

    #4 4 months ago
    Quoted from pinwiztom:

    To be clear you are talking about head bolts, not leg bolts?

    yes

    #5 3 months ago

    I get them at Tractor Supply - $2.19 a pound. I think you get 7 to a pound with 4 inch ones. So less than 32 cents a piece.

    1 week later
    #6 3 months ago

    Taking a look at everything, I have noticed that the 3-3/4" are only needed for the forward pair of bolts (i.e., the cabinet slopes downward away from the top module), and so I've decided to just clean up the best ones I have at this length and use them. Whenever I get around to doing an order at Fastenal, I'll get fresh new ones.

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