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Aerospace standards demand accurate assembly tools and real-time results data that can be easily traced. Sturtevant Richmont has wireless error-proofing solutions designed to meet aerospace standards. We have solutions that cover torque application requirements between 5 inch-ounces up to 600 foot-pounds. There are battery-powered tools that extend the torque range capabilities. 

Sturtevant Richmont offers six tool models that provide torque and angle measurement. Torque and angle are significantly more accurate than torque alone. Up to 90% of torque can be used to overcome friction. Thread lubrication and other factors can vary clamping force by up to 30% with the same torque application. Torque and angle measurement create a more accurate estimate of clamping force.

This page covers our digital torque and angle click wrench. We call the TAC for Torque and Angle Control. 

To create the TAC wrench, we combined the best features of our SLTC FM 2.3 GHz click wrench with the best features of our 1350 Series Exacta 2 digital torque and angle wrench. 

The result is a truly unique torque tool. It is two tools in one body. You get the speed and simplicity of a click wrench because it is a click wrench. You get the accuracy and actual torque and angle value result reporting of a digital wrench because it is a digital wrench. 

The TAC Digital Torque and Angle Wireless Click Wrench and Global 400 Controller provide fast, accurate, repeatable torque application with real-time, date/time stamped NIST traceable documentation. 

The TAC offers an accuracy of +/- 4% of indicated value for torque and the angle accuracy is +/- 1 degree over 180 degrees. 

What makes the TAC digital torque and angle wrench so different?  

The TAC (digital torque and angle wrench) is really two wrenches in one. First, and foremost, it is a click wrench. When the preset torque value is achieved, the internal mechanism moves, striking the side of the flattened case. That creates a distinctive sound. The operator stops pulling when the wrench clicked, the LED flashes green, and the display on the Global 400 advances the batch count and flashes green. 

Although the wrench reports like a digital wrench, it is calibrated and set like a traditional preset click wrench. It does not change torque output based on a digital input. The torque value is changed by compressing or relieving the spring, just like a preset click wrench. After all, it is a click wrench. 

TAC digital torque and angle click wrench compliant fastening

Note that there are two torque values shown on the Global 400 display. There is the "click" torque value, the point at which the wrench clicked. There is also the peak value. This is the point at which the operator stopped pulling. The display to the right also shows that the appropriate torque value was achieved 22 degrees of rotation after snug torque was achieved. 

But what if the operator continued to pull? What then? The image below shows exactly what happened. 

TAC digital torque and angle click wrench displayed on Global 400

In this case, the wrench clicked at 9.8 Newton Meters. But the operator continued to pull until the final torque was 17.3 Newton Meters. Both the TAC and the controller display flashed red, indicating NOK. 

The operator can now self-diagnose and determine exactly what he or she did to illicit the NOK. This is both error proofing by guidance and error-proofing by behavior modification. 

TAC Features

  • You get the speed and agility of a click wrench because it is a click wrench.
  • Audible/tactile pulse when preset torque is achieved.
  • You can keep up with the shortest of takt times. 
  • You get the accuracy and reporting capabilities of a digital wrench because it is a digital wrench. 
  • Fully compatible with the Global 400, Global 400mp, and the TCV e2 torque controllers. 
  • Works with the Patented Holding Tool when used with the Global 400 or Global 400mp. 
  • Access to over 200 interchangeable heads.
  • Powered by one AAA NiMH rechargeable battery.
  • Good battery life. Use a recharged battery at the beginning of a shift. 
  • Ships with two NiMH batteries. Charger sold separately.
  • Accuracy of +/- 4% of the indicated value between 20% and 100% of the rated torque capacity.
  • Is equipped with two LEDs. One LED is the traditional Green/Red for OK/NOK. The other LED is a blue LED that pulses when the tool becomes active and is ready for use. LED holds solid blue upon batch completion. 
  • Requires a special tool to set torque value. This prevents inadvertent changes to the torque output. 
  • Comes with ISO 17025 Calibration Certificate if we set the torque value at the factory. 
  • Torque modes of operation include Click and Peak. Click reads the torque value at which the wrench clicked. Peak reads the highest applied torque value. 
  • Operates in Torque and Angle Monitoring (TAM). Modes of operation are set in the controller and can be changed on a parameter by parameter basis. 
  • Torque value must be changed by adjusting spring tension. 

Modes of Operation

The TAC operates in either Initial Peak or Torque and Angle Monitoring (TAM). In either mode, the click wrench function and the digital functionality work together. 

Torque and Angle Monitoring (TAM) provides several advantages over Initial Peak. TAM immediately notifies the operator that they are attempting to tighten a previously tightened fastener. We call that "Double Hit" protection. TAM also can identify potential problems during torque application. 

One of our customers has a build where they use a felt gasket as part of the assembly. In assemblies where the operator failed to insert the felt gasket, the units leaked.

During the tool demonstration, we were able to show that using a TAC wrench operating in TAM, the TAC wrench identified builds where the gasket was omitted. Once they were certain that the function worked, they eliminated one of the leak tests.  Their quality improved and their cost of rework and warranty dropped. 

You can learn more about the TAC by going to the TAC page on our website. There you can find details on model capacity and get a deeper dive into all the features and functions that make the TAC wrench such a popular solution. Be sure to visit the Global 400 torque controller page. 

Need model and capacity information to order? See below.

TAC digital torque and angle preset click wrench dimensional legend

Part # Model



A (in) B (in) C (in) D (in) Head



810712 TAC 150i

30 to 150 in-lb

2.5 to 12.5 ft-lbs

7 3/32  1 31/64  15/16 1 47/64 Pin and Spring Dovetail 0.5
810713 TAC 300i

60 to 300 in-lbs

5 to 25 ft-lbs.

9 1/32  1 21/64  15/16   1 47/64 Pin and Spring Dovetail 0.5
810714 TAC 750I

150 to 750 in-lbs

12.5 to 62.5 ft-lbs.

12 53/64 1 21/64   1"  1 47/64 Pin and Spring Dovetail 0.5
810715 TAC 1800I

360 to 1800 in-lbs.

30 to 150 ft-lbs.

16 3/16   1 21/64  1 1/4   1 47/64 Pin and Spring Dovetail 1.3
810721 TAC 1800I  ERGO

360 to 1800 in-lbs

3- to 150 ft-lbs.

20 5/16   1 21/64  1 1/4  1 47/64 Pin and Spring Dovetail 1.3
10711 SR CONNECT Calibration Software

Included SR CONNECT Wireless Radio Interface

Part # 10711 sold separately

Required for wrench calibration

If you are not calibrating the wrench, Part # 10711 is NOT required



Wireless Radio Interface

SR CONNECT is used in calibrating the wrench.             
10740 4 Slot Battery Charger Charger sold separately            
10741 8 Slot Battery Charger Charger sold separately            
21970 AAA NiMH Battery *TAC ships with two AAA NiMH Batteries            

An Important Note About Batteries

The TAC is powered by a single AAA NiMH rechargeable battery. Installing a freshly charged NiMH battery takes less than 10 seconds. The TAC ships with two PowerEx NiMH rechargeable batteries. Chargers are sold separately. 

The TAC is built around sophisticated electronics that need a very steady power stream. That voltage is best supplied by a NiMH battery. NiMH rechargeable batteries provide 1.2 volts. The fully charged battery has an immediate drop in current that remains steady until the point at which the battery power is exhausted. Then the power drops to zero. 

Alkaline batteries provide 1.5 volts of power. That is too much for the TAC electronics. The AAA-sized lithium-Ion batteries can provide multiple voltage levels. Some AAA lithium-ion batteries can provide up to 9 volts. At best you can hope for inaccurate readings. But chances are good the higher voltages could damage the electronics and immediately voids your warranty. 

Good operational procedures call for using our NiMH AAA rechargeable batteries. Having tested multiple brands, we have found that Powerex NiMH batteries are a good match for our electronic requirements. Please be sure to use the recommended NiMH batteries. 

Or, if you'd like to contact your local Sturtevant Richmont sales professional,


Sturtevant Richmont tools are made in Carol Stream, Illinois by highly capable hands.