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5A Spike Thread


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I am pretty sure that …
UNF is 1/4-28
UNC is 1/4-20

I could see using 1/4-28 as it gives less movement versus angle, but I suggest just going to a bolt shop and get one of each.
Then either hold em up against the old ones, or use some soup cans around the edges to hold the thing int the air and see which one screws in?

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