Suck It SM Nut size?

Hello! I went to remove my Suck it SM dust boot and the nut on the back seems to have disappeared into the abyss.

Would anyone happen to know the thread pattern so I can replace it? It seems like the nut itself isnt a tall as a standard one as well….

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I believe the knurled thumb screw uses 1/4-20 coarse thread. The standard hex nut would be 7/16” across flats and ~7/32” thick.

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In case anyone is wondering it is indeed a 1/4 x 20 nut and to get the low profile specifically it would be a “jam nut”. I just ran to the local big box and it works perfectly.

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