• 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

Industrial Fasteners Institute

Specifications

Product

Structural Bolting

Unit of Measure

English

Type

Type A325
Direct Tension Indicator Size1 1-1/4 in

Min. Inside Dia. (A)

1.311 in

Max. Inside Dia. (A)

1.315 in

Max. Protrusion Tangential Dia. (B)

1.800 in

Min. Outside Dia. (C)

2.480 in

Max. Outside Dia. (C)

2.500 in

No. of Protrusions (Equally Spaced)

7

Min. Thickness without Protrusion

0.158 in

Max. Thickness with Protrusion

0.270 in

Codes and Standards

Codes and Standards

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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