Stress Indicators Expands Production Capacity, Fastener Size Range

Stress Indicators has responded to increasing customer demand by significantly increasing its production capacity.  The addition of a new CNC Turning Center is the centerpiece of the expansion, not only because it increases factory throughput for machining bolts, but also because it can accommodate fasteners as large as 2.5” (M64) in diameter. With the new […]


Rethink Bolting: What Does a SmartBolt Do that a DTI Washer Can’t?

Both DTI washers and DTI SmartBolts can indicate when a required bolt tension has been achieved in a fastener assembly. DTI washers feature bumps that flatten out as the bolt is tightened. By using a feeler gage of the correct dimension, an installer may conclude that a certain bolt tension has been achieved.  DTI SmartBolts […]

NPO Radio logo |

Stress Indicators, Inc. CEO Discusses Exports with NPO Radio

The Stress Indicators, Inc. CEO, Charles Popenoe, was recently interviewed by NPO, a public-service radio channel in the Netherlands, to discuss the effects of the strengthening U.S. dollar on exports by American manufacturers. Stress Indicators, Inc. currently exports SmartBolts® technology to industrial clients based in North and South America, Africa, Europe, Asia and Australia. Listen to the […]

SmartBolts-Rethink Bolting-What Does a SmartBolt Do that a Torque Wrench Can't

Rethink Bolting: What Does a SmartBolt Do that a Torque Wrench Can’t?

Are you using a torque wrench to tighten your bolts? If so, it means that the bolts you are tightening are essential components and need to be tightened with a certain measurable amount of accuracy. For example, consider the bolt that secures the lawnmower blade to an engine. The designer of the assembly has provided […]

SmartBolts in Environment

Six Bolting Challenges: True Customer Stories

At Stress Indicators, we field calls and e-mails from people around the world who have bolting challenges.  They all have the goal of finding a solution.  For many of them, using the versatile SmartBolts® Visual Indication System™ provides the answer.  Here are six bolting challenges we hear frequently from customers.  Do any of the following […]

SmartBolts Demo Units |

DTI SmartBolts Demonstration Unit Easily Shows Indicator Operation

DTI SmartBolts® in action are a sight to see!  An indicator built into the head of the fastener changes color from red to black as tension is applied.  This color change occurs in real-time, with no moving parts, is completely reversible and has no detrimental effect on the useful life of the fastener. Demonstrating operation […]

Assorted SmartBolts |

Quick Quote Service Now Available for Pre-Engineered SmartBolts

At Stress Indicators, we know our customers are always looking for ways to be more efficient. We developed SmartBolts® to improve the efficiency of your bolted joint installation and maintenance procedures. Now, we offer you a further efficiency with the introduction of Quick Quote, our fastest quoting service, available only for the recently announced DTI […]

DTI SmartBolts – Pre-Engineered Product Line and 2015 Catalog

At Stress Indicators, we have made our reputation by working closely with clients to develop SmartBolts solutions tailored to meet specific application requirements, and we will to continue to expand our capabilities in this area.  But now we are offering a new option for customers that have asked for a simpler and faster way to […]

Largest SmartBolts |

World’s Largest SmartBolts Manufactured for the Mining Industry

Stress Indicators, Inc. recently manufactured the largest DTI SmartBolts® to date at the request of mining equipment manufacturer FLSmidth. Weighing in at over 10 lbs., these SmartBolts are 2” in diameter and include our two most popular product upgrades: a Protective Recess and a Contamination Seal. The Protective Recess reduces the risk of impacts to a […]

SmartBolts Large Diameter |

Stress Indicators, Inc. Expands Testing Capabilities

Stress Indicators, Inc. has expanded its manufacturing range to satisfy customer demand for SmartBolts® in applications that require large diameter fasteners. SmartBolts in diameters as large as 2-1/2” (M64) can now be tested in our new Skidmore-Wilhelm Model K tension tester. The Model K is the largest unit available from the company, and it was […]