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See NASA quote.


Why SureBolt?

Measures tension not torque,

Patented whole echo method,

Graphs tension changes in real-time,

Instrument is built into the PC,

  13.3" Color TOUCHSCREEN
ToughBook Open & Closed

Friction varies too much, bolt to bolt,

Not fooled by friction variations,

Using lubrication still leaves large friction variations,

Avoid flange leaks,


Prove to safety you took a reliable tension reading,

Far greater reliability,

All other bolt gages are one-point bolt gages,

No more zero-crossing peak jumping,

ALL other bolt gages have problems with peak jumping,

Dramatic improvement due to a new patented DSP technique,

Proven by NASA,

Can record over a million bolt tensions with their waveforms,

Playback built in,

Excel compatible data files,

Flange bolts easily grouped together,

Critical bolts,

Verify your design,


Tension verification,


Much easier to use,

Graphical help,

On-line help,

Dynamic help,

13" Color Screen instead of 5" black & white screen,

Full keyboard instead of a few cryptic keys,

Record field notes with your tension data,

You can use long file names,

Large on-screen buttons,

Familiar WinXP/2000 operating system,

Full featured laptop - Panasonic Toughbook Model 72 computer,

1 year limited warrantee,

No need to transfer data to another machine,

No hidden information,

To sum it up, vastly easier and more reliable.

Press here for a detailed point by point comparison to all other bolt gages.

On-Site Consulting Services


On-site consulting services are available through North American Bolting Service (780-983-1858). They have over 20 years of experience with ultrasonic bolt gages. Ask for Gunther Lorenz.

Bolt Calibration Services  

For many standard or special bolt types, North American Bolting Service (780-983-1858) can determine the ultrasonic stress and temperature responses experimentally.  Contact them for information, or for a quote.



We do NOT give out our client addresses to anyone, for any price. Enter any questions you have in the form below.


Let North American Bolting Service (780-983-1858) know how they can be of service to you. They will be glad to discuss your custom bolting application with you. If SureBolt is applicable, they will discuss with you the exact approach to get the most accurate and reliable tension measurements.

You will NOT be contacted by a salesman. Only an experienced application engineer. They want to understand all the applications where SureBolt can be useful. Therefore, one of their boltgage engineers will call you (if that is what you suggest in your comments), or email you an answer to your questions. Only give us the information you want them to have. 

There are no required fields that you have to fill in. We just want to understand your application and help if we can.



Questions or Comments


Contact Information






Let us know how we can help you.

(800) 732-7832
Postal address
1022 Antelope Trail, Winter Springs, FL 32708, USA

Send your email to with questions or  comments about how we can help. Contact us here, or type in the email address shown above (Due to spam, we have replaced the text email address, with the image email address shown above).

Note: Privacy. We will NOT give your contact information to anyone.

 No more guessing as to which "one point" is the right point.


The FIRST whole echo method (patented DSP Technique).

SureBolt picture

Built into a 
Panasonic Toughbook

Weather proof keyboard.

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Last Modified: September 27, 2011