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LOZAGU Nut and Bolt Thread Checker, 26 Male/Female Gauges - 14 Inch & 12 Metric, Thread Checker Standard and Metric, Bolt Size and Thread Checker

4.2 4.2 out of 5 stars 86 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Nut & Bolt Assortment Sets by LOZAGU
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26 Gauges - 14 Inch & 12 Metric
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Purchase options and add-ons

Size 26 Gauges - 14 Inch & 12 Metric
Color Black Silver
Material HSS (High-speed Steel)
Brand LOZAGU
Item dimensions L x W x H 5 x 4.3 x 1.7 inches

About this item

  • Nut & Bolt thread checker was designed to make your job easier and improve efficiency, being a fast and simple way of verifying the thread of your bolts and nuts. Applicable to mechanical repairs, or common threads in plumbing, air and gas connections, etc.
  • Made of high-quality high-speed steel, this is a rust resistant material that will not bend or break, designed to withstand the test of time.
  • Easy to use: Each individual gauge features a male threaded stud on one end and a female threaded hole on the other. Conveniently assembled onto a wire loop, it's the perfect portable solution.
  • INCH Nut & Bolt Thread Checker Size - Includes: 6-32, 8-32, 10-24, 10-32, 1/4-20, 1/4-28, 5/16-18, 5/16-24, 3/8-16, 3/8-24, 7/16-14, 7/16-20, 1/2-13, 1/2-20.
  • Metric Nut & Bolt Thread Checker Size - Includes: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75.
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Product details

  • Product Dimensions ‏ : ‎ 5 x 4.3 x 1.7 inches; 1.04 Pounds
  • Item model number ‏ : ‎ Nut and Bolt Thread Checker
  • Date First Available ‏ : ‎ July 31, 2023
  • Manufacturer ‏ : ‎ LOZAGU
  • ASIN ‏ : ‎ B0CD7BSFR8
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.2 4.2 out of 5 stars 86 ratings

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Product Description

Nut and Bolt Thread Checker
Nut and Bolt Thread Checker
Nut and Bolt Thread Checker
Nut and Bolt Thread Checker

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Customer reviews

4.2 out of 5 stars
4.2 out of 5
86 global ratings

Customers say

Customers like the performance and ease of use of the mechanical fasteners. They mention that it works quite well and is very helpful for identifying bolt and nut threads. That said, some complain about the size and quality. They say the sizes are hard to read and the checkers have burrs on the threads, making it difficult to use.

AI-generated from the text of customer reviews

4 customers mention4 positive0 negative

Customers are satisfied with the performance of the mechanical fasteners. They mention that it works well and is executed well.

"...Great idea, executed well." Read more

"Work very well." Read more

"Within the size ranges of the specific item, works quite well...." Read more

"works great..." Read more

3 customers mention3 positive0 negative

Customers find the mechanical fasteners to be easy to use. They say it's very helpful with the bucket of bolts they have when searching for a certain size, and that it comes in really handy. Customers also say it is good for identifying bolt and nut threads.

"Very helpful with the bucket of bolts I have when I'm searching for a certain size." Read more

"Good for identifying bolt and nut threads..." Read more

"Comes in really handy..." Read more

5 customers mention0 positive5 negative

Customers are dissatisfied with the quality of the mechanical fasteners. They mention that the threads are incorrectly cut or corroded, making it difficult to check them. Some customers also report that the checkers have burrs on the thread.

"...The 3/8 fine thread is so badly corroded a nut only goes on part way...." Read more

"...Also, many of the checkers had burrs on the threads. This is a good idea; I really wanted to like this item...." Read more

"Tested new bolts from hardware store, and the thread checker threads where not cut correct or accurate...." Read more

"...However, the 3/8-16 thread was wrong on both sets I bought, so I sent them back...." Read more

4 customers mention0 positive4 negative

Customers are dissatisfied with the size of the mechanical fasteners. They mention that the sizes are hard to read, missing a correct size, and duplicated. Some customers also report that the checkers have burrs on the threads and would not fit in a 3/8 through hole.

"The first one i checked was 3/8 course thread, it would not even fit in a 3/8 through hole, have no idea what thread it is but does not match 3/8..." Read more

"They seem to be as advertised. But the sizes are hard to read and will probably rub off easily." Read more

"On the SAE pieces the size is very hard to read. I have to use a magnifier. The metric pieces, which are black, are easy to read." Read more

"...Missing a correct size because one size was duplicated, 2. Two different sizes were labeled the same...." Read more

The first one I checked was M10x1.5 and the thread is bonkers. I didn't bother checking the rest
1 Star
The first one I checked was M10x1.5 and the thread is bonkers. I didn't bother checking the rest
Unable to check threads with this thread checker. Overall the kit would be super awesome but if it fails at having the correct thread it'll just cause more problems than doing any sort of good.
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Top reviews from the United States

Wes Mocaby
5.0 out of 5 stars Time Saver.
Reviewed in the United States on May 1, 2024
Size: 44 Gauges - 23 Inch & 21 MetricVerified Purchase
Very helpful with the bucket of bolts I have when I'm searching for a certain size.
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92 FJ-1200
5.0 out of 5 stars No more guessing nut and bolt size
Reviewed in the United States on March 15, 2024
Size: 44 Gauges - 23 Inch & 21 MetricVerified Purchase
Exterior thred on one end and internal thred on the other.

No more guessing what you have.
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Dave W
5.0 out of 5 stars Quality
Reviewed in the United States on March 10, 2024
Size: 26 Gauges - 14 Inch & 12 MetricVerified Purchase
As described and very good quality product.
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david
1.0 out of 5 stars Wrong thread. Update.
Reviewed in the United States on March 29, 2024
Size: 44 Gauges - 23 Inch & 21 MetricVerified Purchase
The first one i checked was 3/8 course thread, it would not even fit in a 3/8 through hole, have no idea what thread it is but does not match 3/8 course 16 tpi, the other end only goes on a bolt part way. The 3/8 fine thread is so badly corroded a nut only goes on part way. I was going to mic the over sized 3/8 and check the thread pitch but was so mad i just closed the box and set it aside to send back. It was labeled 3/8 16. The box is nice, hinged lid with slide latches. Most of the time if the tool is ok, the box is crap. Maybe, after i'm no longer pizzed off , l'll check more and give an update.
A week later and checked it out, the 3/8-16 was , .006 over size and had a 1.5 metric thread, the inside thread was correct. how do you make that kind of a mistake??? Needless to say, it went back. Has it gotten to the point where we have to check every thing we get on line for crap like this. 44 sizes x 2(inside and outside). I got lucky and the 1st one i tried was bad, i may not have found it until after the return window.
One person found this helpful
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Richard S. Lynn, PhD
4.0 out of 5 stars Within the size ranges of the specific item, works quite well.
Reviewed in the United States on November 9, 2023
Size: 26 Gauges - 14 Inch & 12 MetricVerified Purchase
I paid little attention to the choice of the range of thread sizes. Had I done so, I might have paid more to include more sizes, as I have machine screws that exceed the range of this item. For the fractional sizes, the largest is 1/2" for the set I bought. Consider which size range you wish to have before ordering. (The only reason that I did not choose 5 stars is that I always reserve that rating for something that radically exceeds expectations.)
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Mr. John
5.0 out of 5 stars Surprised how often needed!
Reviewed in the United States on February 4, 2024
Size: 26 Gauges - 14 Inch & 12 MetricVerified Purchase
Has come in handy several times after purchase. Should of had this years ago.
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BraneTraveler
5.0 out of 5 stars Wish I Had It A Long Time Ago
Reviewed in the United States on October 20, 2023
Size: 26 Gauges - 14 Inch & 12 MetricVerified Purchase
I have a trove of stuff I’ve purchased over the years the wrong size or thread type. Never enough to do the return process now in permanent storage in unlabeled coffee cans. This is great with both male and female threads. Found this when I was ordering plumbing parts to hopefully replace the wrong size parts I had just purchased. Great idea, executed well.
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ADRIAN T.
5.0 out of 5 stars works great
Reviewed in the United States on December 29, 2023
Size: 26 Gauges - 14 Inch & 12 MetricVerified Purchase
I had my doubts about ordering this, but since I've had it. its been handy for screw size headaches
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