Active standard | Published: 01/12/2017

ASTM F959/F959M-17a

Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use with Structural Fasteners, Inch and Metric Series (Includes all amendments and changes 2/16/2018).

Available languages: English

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Detail information

Designation: ASTM F959/F959M-17a

Publication date: 01/12/2017

Pages: 5

Country: American technical standard

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Anotation

This specification covers the requirements for two types (Types 8.8 and 10.9) of compressible-washer-type direct tension indicators, in nominal diameter sizes M16 through M36, capable of indicating the achievement of a specified minimum bolt tension in a structural bolt and are intended for installation under either a bolt head or a hardened washer. Steel materials used in the manufacture of direct tension indicators shall be designed, processed, heat treated, and protectively coated as specified. The direct tension indicators shall conform to required chemical composition, compression load, outside diameter, number of protrusions, thickness values, inside diameter, and protrusion tangential diameter values.

Keywords:
compressible-washer-type, direct tension indicators, DTI, indicators,, ICS Number Code 21.060.01 (Fasteners in general)

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