Direct Tension Indicator Bolting Method
Direct Tension Indicator or Load Indicating Washer work as follows; when this washer device is compressed while tightening a bolt or stud, the required clamp load is indicated in the fasteners and induced in the bolted joints. TurnaSure was the world's first company to devote all its energies to developing and supplying this unique fastener.
Direct Tension Indicators are used for achieving required tension loads on bolts in countless applications. These include Structural Steel Buildings and Bridges as well as DTI Washers for Studs used in the Petro-Chemical Industry, Anchor Bolts, and SAE Cap Screws for Automotive applications. TurnaSure also supplies special Direct Tension Indicators to customer's individual specifications in a variety of materials including Stainless Steel. The unique designs of our patented Direct Tension Indicators significantly improve field tensioning accuracy. TurnaSure Direct Tension Indicators retain their accuracy regardless of their surface condition during tightening, be they oiled, coated or even rusted.
TurnaSure DTIs are manufactured under one or more of the following patents. US. #5,015,132, #5, 370,483, #5,487,632, #5,667,346, UK #0874955, GB2279421, EP0528912, #874955, 528912, India 191732 and numerous other worldwide patents.