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Your cart is empty.Nut & Bolt Thread Checker (Inch & Metric), Original Version (SWTC-26)
JRF
Reviewed in the United States on February 27, 2025
Handy shop tool for checking common nut and bolt sizes, inch and metric. Well made, super fast shipping. Made in USA. Get one for your shop, hang it on a nail or wear around your neck. Super handy, you’ll wonder how you got along without one for so long. Great gift for anyone’s shop, they will thank you again and again.
Sam Y.
Reviewed in the United States on August 27, 2024
I wish I'd bought one of these Thread Checkers decades ago! I've used it a lot already.
Jeffrey K. Tobrocke
Reviewed in the United States on December 9, 2024
good seller, the thread checker is a necessary tool in any shop,
alm
Reviewed in the United States on December 25, 2024
Perfect for what I needed
James W. Anderson
Reviewed in the United States on October 28, 2021
This is a surprisingly handy tool, or at least I think it is.I am more than a little obsessive-compulsive about organizing junk that I have, and recently I took it to a new level by purchasing a set of wall-mounted parts drawers and this. One rainy evening I went out to my garage and started going through cans and bins full of screws, bolts, nuts and washers that I had accumulated over the years and began sorting them out into parts drawers, putting beautiful printed labels on each as I went. Hours, nay, days later my job was finished, and I now have every part of practically every size an arm's length away.Seriously, this is a very handy tool for determining the size of bolts, nuts, and washers, as well as the coarseness of the threads, and if you have the patience to go through an hours-long sorting exercise like I did you will learn to visually recognize these sizes and coarseness of threads visually, so that eventually you won't need this tool. As someone who previously couldn't tell a #10 from a #12, or a 24 from 32 thread, this has been a very valuable learning aid, and it has helped my OCD greatly.
me
Reviewed in the United States on April 12, 2021
A long time ago I went to a website that sells hardware and ordered one of every size but and bolt they had. But it was only 19 sizes. This has 26. Anyways I tested them all and they were all smooth both inside and out. Pretty nice.Also, the sizes are indeed stamped in and filled in with paint. They'll never wear off. If you dropped them in acetone or something and the paint dissolved you could rub more paint over it and wipe away the excess with a rag and isopropyl alcohol.It's true, trying to thread one into a hole really sucks because they're all on a steel cable. The cable isn't the most flexible thing and the weight makes it worse. You can't feel what you're doing like that. I tried putting them on a string and that did help a lot because you could isolate one and let the string wrap around the bolt as you turn it. But not good enough for me. I knew when I bought these that I wanted to make a case for them and I did. I won't go into the details but if you're handy that's the way to go. Best part, I had 7 sizes from my first set that this set didn't have. 3 sizes smaller in both inch and metric, and one other inch 12-24. So now I have the ultimate bolt collection.I used thick foam in my case, drilled holes surprisingly easy and they all fit nice and snug. But you could also use magnets.30 bucks is a lot of money, but I think it might actually be more to buy all this hardware individually at home depot or lowes. And to have the male and female on one piece with the size stamped in, yeah I think it's worth it.Very cool thank you.
P. C. Bohl
Reviewed in the United States on October 5, 2020
So helpful to have confirmation of the size and thread pitch. I have worked with and around nuts an bolts all my life but I never could say that I could easily tell between a metric or SAE bolt without help. This is the kind of help I've needed and it's super handy. I deal with both metric and SAE and have a pretty good collection of bolts and nuts that sometimes get mixed together. This is a super efficient way to know which parts go in which bin! And which nuts belong to which bolts. Numbers on the studs are not amazing but I can read them without the aid of a magnifier. They are still new but the markings seem to be just fine ... some reviewers have not been so happy on this point. Mine are ok, not an issue at all.
KM
Reviewed in the United States on September 24, 2019
This is a Good idea, and one I was planning to make for myself, by buying a single screw & bolt of every size, then adhering them to a board, so I could test at will, like in the hardware stores. That idea would work, but if you have a hole, & can't pick it up to screw it into the threads on your board, you're stuck.This is the same idea, but easier to take to the hole, rather than taking the whole piece to the board.Pros:* The Price is high (but the cheapest option I found for a similar item).* This saves me time - Lots of time! Instead of screwing endless unknown screws into unknown holes, I'm usually ID-ing the correct size hole within seconds. Then I can use the opposite end to find the right screw after just a few tries.* At the very least, I know if it's metric or SAE, so if I can't find a screw in my pile, I can buy the correct size immediately, and confidently.Cons:* The sizes are marked on each one, but barely. It's a white stamp, not embossed, so it will wear away soon, I'm sure.* These are incomplete, ie, not every size is on here, but the most common ones are. I haven't had an issue yet, but we'll see over time. If I do, I can just go buy a nut & bolt of that missing size, to compliment my current array for a lot less than buying the bigger, more complete options of this set.* The wire these are attached to is sturdy, & I needed some Bolt cutters to get it off. As others have mentioned, bringing a screw/bolt to the sample holes is super easy, & not an issue at all. But if you need to screw one of the screw ends into an unknown hole, this is not going to let you get more than about a half turn before you find yourself doing some crazy maneuvers to try to get that whole line to twist around repeatedly. Not convenient.Solution:* I cut mine off, & restrung them onto 4 much smaller lines: 1 small sized Line for SAE, & 1 small sized Line for Metric. Then I did the same for the 2 big ended lines. MUCH more convenient, & it's pretty unlikely you're going to grab the wrong line very often. (The jump in sizes is pretty obvious at about half way, on each type, so you're gonna see it with the naked eye).* I also used a much more flexible line, & with so few excess bits per line, it's wildly easier to screw into an unidentified hole, without the hassle. I can always restring them later, if the weaker line breaks. I did use the spacers for thread protection, & then placed all 4 of them in separate baggies, for further protection, since I primarily use the smaller ended parts.Overall, this is a good solution, with some issues. The price was enough lower than other options, that it makes the adjustments worth it to me, and the Time Savings is well worth the money spent, if you find yourself guessing on screw sizes very often - as I do.
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