US & Canada: 800-525-7193International: 215-750-1300 CONTACT US Home TurnaSure DTIs & Indicators Why Use TurnaSure DTIs Bolting Applications for DTIs Projects Using TurnaSure Installation Inspection Bolting Resources About Us The simplest solution for properly tensioning bolts Proper bolt-tensioning is a mission-critical part of any structural steel construction project, any bridge project, wind turbines and numerous applications across automotive, petrochemical and other industries. For decades this was a time- and labor-intensive process, until the Direct Tension Indicator (DTI) was invented by TurnaSure's legacy company. This innovative product allowed customers to quickly and easily confirm that their bolts were properly tensioned, saving huge amounts of time and money during installation and inspection! The most comprehensive product line of bolting technology TurnaSure manufactures the world's largest variety of Direct Tension Indicator Washers (DTIs) including the revolutionary new ViewTite Visual Self-Indicator. Our DTIs are used for achieving required tension loads on bolts in countless applications. These include Structural Steel Buildings, Bridges and Wind Turbines as well as DTI Washers for Studs used in the Petro-Chemical Industry, Anchor Bolts, and SAE Cap Screws for Off-Highway Vehicles and Automotive applications. TurnaSure also supplies special Direct Tension Indicators to customer's individual specifications in a variety of materials including nonferrous and Stainless Steels. Explore our products and their tremendous benefits: The Traditional TurnaSure DTI The NEW ViewTite Self-Indicator Benefits of Using TurnaSure DTIs DTI Uses & Applications Projects Using TurnaSure DTIs Bolting Resources TurnaSure DTIs are currently manufactured to the following standards: ASTM F959/F959M for use on inch or metric ASTM F3125 Grade A325, Grade A490, Grade F1852, Grade F2280, Grade A325M, or Grade A490M bolts. ISO-EN 14399 14399-9 for use on structural bolting assemblies in the European Economic Area. ASTM F2437/F2437M for Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs. TurnaSure’s DTIs are also manufactured for use on HV bolting assemblies per DASt-Guideline 021 and Japanese Standard JISB 1186-F10T strength strength structural bolting assemblies. TurnaSure DTIs in use! TurnaSure DTIs have been used in some of the highest profile projects in the world, under the most demanding requirements. Explore Projects Using TurnaSure See how they work Explore the patented technology that makes TurnaSure DTIs the perfect choice for tensioning bolts. Learn about the technology Home TurnaSure DTIs and Indicators The TurnaSure DTI NEW ViewTite Self-Indicator Why Use TurnaSure DTIs Bolting Applications for DTIs Projects Using TurnaSure Installation Inspection Bolting Resources About Us Contact Us / Get a Quote Sitemap DTI's are recognized by the following international bodies: ©2021 TurnaSure LLC. All rights reserved.