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Description of ASTM-F959M 2013ASTM F959M - 13Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners (Metric)Active Standard ASTM F959M | Developed by Subcommittee: F16.02 Book of Standards Volume: 01.08 ASTM F959MAbstract 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, 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. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. 1. Scope 1.1 This specification covers the requirements for compressible-washer-type direct tension indicators capable of indicating the achievement of a specified minimum bolt tension in a structural bolt. 1.2 Two types of direct tension indicators in nominal diameter sizes M16 through M36 are covered: 1.2.1 Type 8.8 direct tension indicators for use with Specification A325M bolts, and 1.2.2 Type 10.9 direct tension indicators for use with Specification A490M bolts. 1.3 Direct tension indicators are intended for installation under either a bolt head or a hardened washer. (See Research Council on Structural Connections: Specification for Structural Joints Using ASTM A325 or A490 Bolts .) 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 The following precautionary statement pertains only to the test methods portions, Section 12 , and Appendix X1 of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards A325M Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength (Metric) A490M Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints (Metric) B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel D3951 Practice for Commercial Packaging F436M Specification for Hardened Steel Washers (Metric) F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, and Rivets (Metric) F1470 Practice for Fastener Sampling for Specified Mechanical Properties and Performance Inspection Research Council on Structural Connections Standard Specification for St Available from Research Council on Structural Connections at www.boltcouncil.org.Keywords compressible-washer-type; direct tension indicators; DTI; indicators; ICS Code ICS Number Code 21.060.30 (Washers, locking elements) DOI: 10.1520/F0959M-13 ASTM International is a member of CrossRef. ASTM F959MThe following editions for this book are also available...
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