DTI Washers

DTI Washers are simple washer load cells that are manufactured with raised dimples that are used to indicate when the proper tension level has been achieved during tightening, since tension is what we are after NOT TORQUE. DTI’s are manufactured to the F959 specification.

Finshes: Plain (black) & Mechanically Galvanized B695

DTI Washer Dimensions for Plain, Type-3 and Coated

SizeGradeBumpsMin KIPSOutside Diameter (In)Inside Diameter (In)
1/2325412.01.167-1.1870.523-0.527
5/8325419.01.355-1.3750.654-0.658
3/4325528.01.605-1.6250.786-0.790
7/8325539.01.855-1.8750.917-0.921
1325651.01.980-2.0001.048-1.052
1 1/8325656.02.230-2.2501.179-1.183
1 1/4325771.02.480-2.5001.311-1.315
1 3/8325785.02.730-2.7501.442-1.446
1 1/23258103.02.980-3.0001.573-1.577
3/4490635.01.730-1.7500.786-0.790
7/8490649.01.980-2.0000.917-0.921
1490764.02.230-2.2501.048-1.052
1 1/8490780.02.480-2.5001.179-1.183
1 1/44908102.02.730-2.7501.311-1.315
1 3/84908121.02.980-3.0001.442-1.446
1 1/24909148.03.230-3.2501.573-1.577

Table 3: Acceptable Range of Compression Load

DTI SizeA325 (000 lb)A490 (000 lb)
1/2 12-14 15-18
5/8 19-23 24-29
3/4 28-34 35-42
7/8 39-47 49-59
1 51-61 64-77
1 1/8 56-67 80-96
1 ¼ 71-85 102-122
1 3/8 85-102 121-145
1 ½ 103-124 148-178
Source: ASTM F959-09

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