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Home>Nut & Bolt Gauges>Thread Checker
Wall Mounted Thread Checker
Part Number SWTC-WM1
Wall Mounted Thread Checker
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Thread Checker Patent Logo

The Thread Checker you've all been waiting for is here...                

The Wall Mounted Thread Checker

Quickly identify the most common size nuts & bolts in one easy-to-display center!  Starting from the top you have 28 female threaded holes to identify common inch & metric bolt sizes, following that you'll find 28 male threaded studs to identify nut sizes and at the bottom you'll find screw diameter & bolt length checkers.  Mounted on heavy-duty 1/2 Inch Sintra board and predrilled for easy installation, the Wall Mounted Thread Checker is ready to start saving you time and money by ensuring you have the right fastener for the job - the first time!
The Wall Mounted Thread Checker, also known as a Thread Verifier or Thread Identifier is a great addition for any Home, Hobby, or Inventor's Work Shop; Auto, Motorcycle, Marine, ATV or RV Repair Shop; Heavy Equipment Repair Shop, Military Equipment Repair Station, Machine Shop, Fabricating Shop, Assembly Department, Production Department or Quality Inspection Station!


  • Bolt thread checker in both standard and metric sizes
  • Nut thread checker in both standard and metric sizes
  • Bolt length checker in both standard and metric sizes
  • Screw size checker in both standard and metric sizes
  • Mounted on heavy-duty 1/2 Inch Sintra® board

SWTC-WM1 Size Specifications:

Inch: 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; 9/16-12, 9/16-18

Metric: M4x0.7, M5x0.8, M6x1.0, M7x1.0, M8x1.0, M8x1.25, M10x1.0, M10x1.25, M10x1.5, M12x1.25, M12x1.5, M12x1.75

Want your company name or logo on the Thread Checker?
These unique tools also make excellent promotional items!  Give them away to your best customers, take them to trade shows and hand them out to serious prospects.  Forget personalized pens, mugs, and key chains...give them something they will use and tell their friends about!  If you really want to make an impression, get the Thread Checker personalized with your company logo today!

Customize Your Wall Mounted Thread Checker

*Minimum Order quantity for customization is 100 pieces.  Call us for a quote today!

Made in USA Logo

  • Customer Reviews Average Rating review View All Reviews
    Retired Engineer
    Was pleasantly surprised at how well laid out and clearly marked this tool is. It really takes the guesswork out of matching and sizing Metric and SAE nuts and bolts. My Thread-Checker is now permanently mounted in my garage, and has already been pressed into service on multiple occasions. An added benefit is that I no longer have an envy-attack when I go into the hardware stores, and see their thread checkers.
    Reviewed by: Larry W. from Western New York State. on 4/21/2016
    retired auto tech
    I bought because I got tired of running to Ace Hardware to use thread board. Now that I have one in my garage wall I can check my bolts and nuts on the board, then go get the right chrome hardware for my show car !
    Reviewed by: Michael Collins Sr from northern Ky. on 3/11/2016
    Invaluable Tool!
    I manage a hospital maintenance department and our guys are always searching for fasteners and sizes. In the past they have been getting out the tap & die kit to help ID a thread. I bought this and was a hero! Thanks for a quality USA product.
    Reviewed by: Rich M from Pennsylvania. on 3/2/2016
    Got tired of driving to Lowes to use their thread checker so I bought my own. It hangs nicely on a wall stud in my garden shed. Holes to mount it are pre-drilled and it looks good too.
    Reviewed by: B Campbell from Lancaster Pa. on 2/16/2016
    Prototype Development
    Used it four times right out of the box. Great quality, made in USA. Thread checker will be used often in our shop.
    Reviewed by: Mike from Fort Wayne, Indiana. on 1/25/2016
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