• Dimensional Conformance. Direct tension indicators shall have the following characteristics inspected to ASME B18.18.2, page M-11, to the inspection levels shown:
    Characteristic
    Inside Diameter - B (Inspection Level)
    Protrusion tangential diameter - B (Inspection Level)
    Visual - C (Inspection Level)
    If verifiable in-process inspection is used
  • Nominal direct tension indicator sizes are intended for use with fasteners of the same nominal diameter.
Unit of Measure

Manufacturer

Manufacturer

N/A Industrial Fasteners Institute

Specifications

Product

N/A Structural Bolting

Unit of Measure

N/A English

Type

N/A Type A490
Direct Tension Indicator Size1 N/A 3/4 in

Min. Inside Dia. (A)

N/A 0.786 in

Max. Inside Dia. (A)

N/A 0.790 in

Max. Protrusion Tangential Dia. (B)

N/A 1.125 in

Min. Outside Dia. (C)

N/A 1.730 in

Max. Outside Dia. (C)

N/A 1.750 in

No. of Protrusions (Equally Spaced)

N/A 6

Min. Thickness without Protrusion

N/A 0.142 in

Max. Thickness with Protrusion

N/A 0.240 in

Codes and Standards

Codes and Standards

N/A ASME Draft Revision B18.2.6 2003
  • 1 Nominal direct tension indicator sizes are intended for use with fasteners of the same nominal diameter.
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