DuraSquirt Target Stress DTI
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DuraSquirt Target Stress DTI

DuraSquirt Target Stress Direct Tension Indicating Washers are designed to be used as verification devices when torquing bolted flange joint assemblies. They are single use mechanical load cells that visually indicate when a specific bolt stress has been achieved. Using your existing fasteners, torquing pattern and tools, the DuraSquirt Target Stress DTIs will let you know if your toque generated the desired stud stress, and a visual marker that the flange has been completed as required. 

DuraSquirt Target Stress DTIs are available in bolt diameters from 3/4” up to 1-1/2” designed to clients’ required stud stress from 35 KSI up to 80 KSI in 5 KSI increments. They are not specific to a particular flange class or type, gasket or seal.

Application DataDuraSquirt Target Stress DTI

DuraSquirt Target Stress DTI's are suitable for use with:
Stud Bolts Any Grade. In 3/4, 7/8, 1, 1 1/8, 1 1/4, and 1 1/2 inch diameters. 
Gaskets Any Gasket
Flange Material Any Flange Material
Flange Types Any Flange Type
Target Stress Specified by end user based on fastener, flange, and gasket. Available from 35 KSI to 80 KSI in 5 KSI increments. 

DuraSquirt Target Stress DTI
Each DTI is laser marked, detailing the bolt diameter, target stress, and "TS" to denote the washer as a Target Stress DTI. The bolt diameter and target stress are marked in smaller text along the OD for inspectors, to confirm parameters after installation.

Dimensional DataDuraSquirt Target Stress DTI

Using a longer stud bolt to accommodate the DuraSquirt Washer may not be necessary. The uncompressed thickness of the DuraSquirt Flange Washer is 0.354", and should fall within tolerance to still allow acceptable thread protrusion from the nuts on either side of the stud bolt. However, if desired, a stud bolt 1/4" longer may be used to accommodate the added thickness of the washer. When an additional F436 washer is used on the flange opposite the DuraSquirt washer, a stud bolt 1/2" longer should be used.

Grade 5 Head Marking

Diameter Outside Diameter Inside Diameter Thickness Weight
3/4 0.7900 1.4360 0.3540 0.1075
7/8 0.9210 1.7180 0.3540 0.1575
1 1.0520 1.9370 0.3540 0.2113
1 1/8 1.1830 2.1870 0.3540 0.2544
1 1/4 1.3150 2.4370 0.3540 0.3105
1 1/2 1.5770 2.9370 0.3540 0.4500
  1. All dimensions in inches.
  2. Dimensional data for a given diameter washer are independent of the specified target stress.

Installation InstructionsDuraSquirt Target Stress DTI

DuraSquirt Target Stress DTI Installation Instructions Page 1

DuraSquirt Target Stress DTI
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Diameter Load Rating Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM
3/4 35 KSI 0.79 1.4360 0.3540 WLODK35075 10-15 Working Days $2.76382/EA EA
7/8 35 KSI 0.9210 1.7180 0.3540 WLODK35087 10-15 Working Days $3.18258/EA EA
1 35 KSI 1.0520 1.9370 0.3540 WLODK35100 10-15 Working Days $3.51759/EA EA
1 1/8 35 KSI 1.1830 2.1870 0.3540 WLODK35112 10-15 Working Days $4.52261/EA EA
1 1/4 35 KSI 1.3150 2.4370 0.3540 WLODK35125 10-15 Working Days $4.85762/EA EA
1 1/2 35 KSI 1.5770 2.9370 0.3540 WLODK35150 10-15 Working Days $7.45394/EA EA
3/4 40 KSI 0.79 1.4360 0.3540 WLODK40075 10-15 Working Days $2.76382/EA EA
7/8 40 KSI 0.9210 1.7180 0.3540 WLODK40087 10-15 Working Days $3.18258/EA EA
1 40 KSI 1.0520 1.9370 0.3540 WLODK40100 10-15 Working Days $3.51759/EA EA
1 1/8 40 KSI 1.1830 2.1870 0.3540 WLODK40112 10-15 Working Days $4.52261/EA EA
1 1/4 40 KSI 1.3150 2.4370 0.3540 WLODK40125 10-15 Working Days $4.85762/EA EA
1 1/2 40 KSI 1.5770 2.9370 0.3540 WLODK40150 10-15 Working Days $7.45394/EA EA
3/4 45 KSI 0.79 1.4360 0.3540 WLODK45075 10-15 Working Days $2.76382/EA EA
7/8 45 KSI 0.9210 1.7180 0.3540 WLODK45087 10-15 Working Days $3.18258/EA EA
1 45 KSI 1.0520 1.9370 0.3540 WLODK45100 10-15 Working Days $3.51759/EA EA
1 1/8 45 KSI 1.1830 2.1870 0.3540 WLODK45112 10-15 Working Days $4.52261/EA EA
1 1/4 45 KSI 1.3150 2.4370 0.3540 WLODK45125 10-15 Working Days $4.85762/EA EA
1 1/2 45 KSI 1.5770 2.9370 0.3540 WLODK45150 10-15 Working Days $7.45394/EA EA
3/4 50 KSI 0.79 1.4360 0.3540 WLODK50075 10-15 Working Days $2.76382/EA EA
7/8 50 KSI 0.9210 1.7180 0.3540 WLODK50087 10-15 Working Days $3.18258/EA EA
1 50 KSI 1.0520 1.9370 0.3540 WLODK50100 10-15 Working Days $3.51759/EA EA
1 1/8 50 KSI 1.1830 2.1870 0.3540 WLODK50112 10-15 Working Days $4.52261/EA EA
1 1/4 50 KSI 1.3150 2.4370 0.3540 WLODK50125 10-15 Working Days $4.85762/EA EA
1 1/2 50 KSI 1.5770 2.9370 0.3540 WLODK50150 10-15 Working Days $7.45394/EA EA
3/4 55 KSI 0.79 1.4360 0.3540 WLODK55075 10-15 Working Days $2.76382/EA EA
7/8 55 KSI 0.9210 1.7180 0.3540 WLODK55087 10-15 Working Days $3.18258/EA EA
1 55 KSI 1.0520 1.9370 0.3540 WLODK55100 10-15 Working Days $3.51759/EA EA
1 1/8 55 KSI 1.1830 2.1870 0.3540 WLODK55112 10-15 Working Days $4.52261/EA EA
1 1/4 55 KSI 1.3150 2.4370 0.3540 WLODK55125 10-15 Working Days $4.85762/EA EA
1 1/2 55 KSI 1.5770 2.9370 0.3540 WLODK55150 10-15 Working Days $7.45394/EA EA
3/4 60 KSI 0.79 1.4360 0.3540 WLODK60075 10-15 Working Days $2.76382/EA EA
7/8 60 KSI 0.9210 1.7180 0.3540 WLODK60087 10-15 Working Days $3.18258/EA EA
1 60 KSI 1.0520 1.9370 0.3540 WLODK60100 10-15 Working Days $3.51759/EA EA
1 1/8 60 KSI 1.1830 2.1870 0.3540 WLODK60112 10-15 Working Days $4.52261/EA EA
1 1/4 60 KSI 1.3150 2.4370 0.3540 WLODK60125 10-15 Working Days $4.85762/EA EA
1 1/2 60 KSI 1.5770 2.9370 0.3540 WLODK60150 10-15 Working Days $7.45394/EA EA
3/4 65 KSI 0.79 1.4360 0.3540 WLODK65075 10-15 Working Days $2.76382/EA EA
7/8 65 KSI 0.9210 1.7180 0.3540 WLODK65087 10-15 Working Days $3.18258/EA EA
1 65 KSI 1.0520 1.9370 0.3540 WLODK65100 10-15 Working Days $3.51759/EA EA
1 1/8 65 KSI 1.1830 2.1870 0.3540 WLODK65112 10-15 Working Days $4.52261/EA EA
1 1/4 65 KSI 1.3150 2.4370 0.3540 WLODK65125 10-15 Working Days $4.85762/EA EA
1 1/2 65 KSI 1.5770 2.9370 0.3540 WLODK65150 10-15 Working Days $7.45394/EA EA
3/4 70 KSI 0.79 1.4360 0.3540 WLODK70075 10-15 Working Days $2.76382/EA EA
7/8 70 KSI 0.9210 1.7180 0.3540 WLODK70087 10-15 Working Days $3.18258/EA EA
1 70 KSI 1.0520 1.9370 0.3540 WLODK70100 10-15 Working Days $3.51759/EA EA
1 1/8 70 KSI 1.1830 2.1870 0.3540 WLODK70112 10-15 Working Days $4.52261/EA EA
1 1/4 70 KSI 1.3150 2.4370 0.3540 WLODK70125 10-15 Working Days $4.85762/EA EA
1 1/2 70 KSI 1.5770 2.9370 0.3540 WLODK70150 10-15 Working Days $7.45394/EA EA
3/4 75 KSI 0.79 1.4360 0.3540 WLODK75075 10-15 Working Days $2.76382/EA EA
7/8 75 KSI 0.9210 1.7180 0.3540 WLODK75087 10-15 Working Days $3.18258/EA EA
1 75 KSI 1.0520 1.9370 0.3540 WLODK75100 10-15 Working Days $3.51759/EA EA
1 1/8 75 KSI 1.1830 2.1870 0.3540 WLODK75112 10-15 Working Days $4.52261/EA EA
1 1/4 75 KSI 1.3150 2.4370 0.3540 WLODK75125 10-15 Working Days $4.85762/EA EA
1 1/2 75 KSI 1.5770 2.9370 0.3540 WLODK75150 10-15 Working Days $7.45394/EA EA
3/4 80 KSI 0.79 1.4360 0.3540 WLODK80075 10-15 Working Days $3.18258/EA EA
7/8 80 KSI 0.9210 1.7180 0.3540 WLODK80087 10-15 Working Days $3.18258/EA EA
1 80 KSI 1.0520 1.9370 0.3540 WLODK80100 10-15 Working Days $3.51759/EA EA
1 1/8 80 KSI 1.1830 2.1870 0.3540 WLODK80112 10-15 Working Days $4.52261/EA EA
1 1/4 80 KSI 1.3150 2.4370 0.3540 WLODK80125 10-15 Working Days $4.85762/EA EA
1 1/2 80 KSI 1.5770 2.9370 0.3540 WLODK80150 10-15 Working Days $7.45394/EA EA