Shopping Cart

Your cart is empty.

Your cart is empty.

Thread Checker, 44 Nut and Bolt Thread Checker Individually Housed in Case, Bolt Size and Thread Gauge 23 Inch & 21 Metric, Suitable for Size Check in Tricky and Narrow Areas

Free shipping on orders over $29.99

$29.99

$ 13 .99 $13.99

In Stock
  • 【Three Clear Ways to Read Sizes】Sizes are clearly marked in three ways: laser-engraved on the gauge, displayed on a size chart sticker, and printed on the foam padding. This ensures quick size identification, making it easy to find and match the correct size.
  • 【23 Inch & 21 Metric Sizes】The set includes 23 common inch sizes and 21 metric sizes, covering a wide range of applications: Inch sizes (Blue): 1-12, 1-8, 3/4-16, 3/4-10, 5/8-18, 5/8-11, 9/16-18, 9/16-12, 1/2-20, 1/2-13, 7/16-20, 7/16-14, 3/8-24, 3/8-16, 5/16-24, 5/16-18, 1/4-28, 1/4-20, 10-32, 10-24, 8-32, 6-40, 6-32. Metric sizes (Red): M3-0.5, M4-0.7, M5-0.8, M6-1.0, M7-1.0, M8-1.0, M8-1.25, M10-1.0, M10-1.25, M10-1.5, M12-1.25, M12-1.5, M12-1.75, M14-1.5, M14-2.0, M16-1.5, M16-2.0, M20-1.5, M20-2.5, M24-2.0, M24-3.0.
  • 【Quick Identification & Time Saver】Simply screw a nut or bolt onto the thread checker to instantly verify its size in seconds. No more trips to the hardware store to check sizes — quickly identify and replace damaged, rusted, or worn-out nuts and bolts, saving time and increasing efficiency.
  • 【Convenient Storage Case】Each thread checker is individually housed in a foam storage case, keeping nuts and bolts organized and easily accessible. This design allows you to quickly grab the required piece, especially in tight or hard-to-reach areas. No need to handle a bulky gauge set.
  • 【Laser-Etched Sizes on Both Sides】Each thread gauge features laser-etched sizes on both the front and back for easy readability. Sizes are color-coded , and the double-sided etching eliminates the need to flip the gauge around.
  • 【Well-Organized 44-Piece Set】This set includes 44 pieces of male and female gauges, covering the most commonly used sizes for mechanical work and DIY projects. It helps keep your nuts and bolts sorted, preventing misplacement and ensuring everything stays organized in the compartment case.



Product Description

Thread Checker

Two Colors Coded for Imperial and Metric

Thread Checker
Thread Checker

Allows You to Quickly Identify Nut and Bolt Sizes

Thread Checker

Minimalist and Convenient, Designed Specifically for Professional Users

Thread Checker

Foam Protection Padding

The foam padding inside helps quickly identify the correct size while preventing wear and scratches.

Thread Checker

Portable Storage Box

The uniquely designed storage box helps prevent nuts and bolts from becoming disorganized or lost, keeping tools neat and orderly.

Thread Checker

Storage Box Handle

Equipped with a handle for easy carrying, making it convenient for mobility in various work environments.

Thread Checker

Laser Engraved Markings

The laser-engraved markings on the bolts and threads are durable and will not fade, ensuring clear identification even after long-term use.

Thread Checker

Isaac Momrik
Reviewed in the United States on March 31, 2025
I had a huge assortment of random screws, bolts, and nuts and always have a hard time when I need to find a replacement for something. I bought this sizer to help organize them all and it's been a huge help. No longer am I having to try 5-10 different bolts before finding one that works. The case is really nice and holds all the pieces in place for easy storage.
wes
Reviewed in Canada on March 19, 2025
Item case was badly damaged, but the shipping box was fine......hmmmDo better
Nick
Reviewed in the United States on April 7, 2025
For years, when I could actually find it, I'd been using a 4x8-ish sized thin piece of metal with holes punched out representing thread sizes. Then I'd stick screws through the holes until one was the best fit, in order to sort my always present collections of unsorted screws. This is much easier.
Monica
Reviewed in the United States on April 6, 2025
My friend runs a garage and I gave it to him as a gift. The size and quantity perfectly matched his needs, and he liked it very much
Jung L.
Reviewed in the United States on April 2, 2025
This thread checker is super handy! The individual housings make it easy to find the right size quickly, and it’s great for checking bolts in tight spaces. The variety of metric and inch sizes covers almost everything I need. A must-have for any toolbox!
Recommended Products

$8.38

$ 3 .99 $3.99

4.3
Select Option