Does there exist any type of Nut, that can be screwed on a threaded rod that can slipped in without having to go to the ends of the threaded rod? I can sort of imagine a Nut that was a U shape instead of O shape, or perhaps two C shapes that could interlock some how. Does anything like this exist?
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4 Answers
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Granger Supply makes two different types:
The round one is called A Steel Shaft Collar,two piece, Threaded . The second one is called a "CADDY THREADED ROD NUT". They come in a number of sizes.
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1$\begingroup$ Please include what its actually called. $\endgroup$ Commented Jul 11, 2019 at 6:21
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1$\begingroup$ The round one is called A Steel Shaft Collar, Clamp, Threaded . The second one is called a "CADDY THREADED ROD NUT". They come in a number of sizes. $\endgroup$– JACKCommented Jul 11, 2019 at 12:20
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1$\begingroup$ Also Dave, if you want a Rube Goldberg solution, you can cut a nut in half with a hack saw and then use a hose clamp to clamp the nut around the threaded rod. This works for light to medium applications. $\endgroup$– JACKCommented Jul 11, 2019 at 15:02
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$\begingroup$ @DKNguyen LOL You don't like my Rube Goldberg solution?? lol $\endgroup$– JACKCommented Jul 13, 2021 at 22:36
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In the world of machining, a lathe uses a feature called a half-nut. It's two half-nuts mounted on a slide in which they are separated to disengage the carriage from the lead screw, or brought closer together to engage the carriage to the lead screw. This stops or starts movement of the cutting tool on the work piece.
The image above comes from Mini-lathe.com website and shows a crude version, which is all that is needed to accomplish the above-described task. The release/activation mechanism moves the upper half downward onto the lead screw (aka threaded rod, specialty version) and the lower half upward.
There are as many versions of half-nuts as there are versions of lathes using them.
answered Jul 10, 2019 at 18:35
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Yes, a threaded tube that has been cut in half length-wise and clamped or joined to the threaded section with nuts and bolts or welded as suitable.
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try a sliding speed nut: 
very easy to slide along threaded rod https://www.leevalley.com/en-ca/shop/hardware/jig-and-fixture-parts/101377-1-4-20-and-5-16-18-brass-speed-nuts
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$\begingroup$ The question was, "*Does there exist any type of Nut, that can be screwed on a threaded rod that can slipped in without having to go to the ends of the threaded rod? Your suggestion has to go on via the end of the rod. See the accepted answer for what the OP was looking for. Also, you should at least post an image of what you are referring to so that the answer still makes sense when the link dies. Welcome to E.SE. $\endgroup$ Commented Jul 12, 2021 at 19:51