ASTM F959M-07

Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners [Metric]

ABSTRACT
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.
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 A 325M bolts, and  
1.2.2 Type 10.9—direct tension indicators for use with Specification A 490M 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 A 325 or A 490 Bolts.)  
1.4 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.

General Information

• Status: Historical
• Publication Date: 30-Nov-2007
• ICS: 21.060.30 - Washers, locking elements
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.02 - Steel Bolts, Studs and Nuts

Relations

• Replaces: ASTM F959M-06 - Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners [Metric]
• Effective Date: 01-Dec-2007
• Replaced By: ASTM F959M-13 - Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners (Metric) (Withdrawn 2016)
• Effective Date: 01-Mar-2013

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F959M −07
StandardSpecification for
Compressible-Washer-Type Direct Tension Indicators for
1
Use With Structural Fasteners (Metric)
This standard is issued under the fixed designation F959M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D3951Practice for Commercial Packaging
F606MTest Methods for Determining the Mechanical Prop-
1.1 This specification covers the requirements for
erties of Externally and Internally Threaded Fasteners,
compressible-washer-type direct tension indicators capable of
Washers, and Rivets (Metric)
indicatingtheachievementofaspecifiedminimumbolttension
F1470Practice for Fastener Sampling for Specified Me-
in a structural bolt.
chanical Properties and Performance Inspection
1.2 Two types of direct tension indicators in nominal
2.2 Research Council on Structural Connections Standard:
diameter sizes M16 through M36 are covered:
Specification for Structural Joints Using ASTM A 325 or
1.2.1 Type 8.8—direct tension indicators for use with Speci- 3
A490 Bolts
fication A325M bolts, and
1.2.2 Type 10.9—direct tension indicators for use with
3. Terminology
Specification A490M bolts.
3.1 Definitions of Terms Specific to This Standard:
1.3 Direct tension indicators are intended for installation
3.1.1 compressible-washer-type direct tension indicator,
under either a bolt head or a hardened washer. (See Research
n—a washer-type element inserted under the bolt head or
CouncilonStructuralConnections:SpecificationforStructural
hardened washer, having the capability of indicating the
Joints Using ASTM A325 or A490 Bolts.)
achievement of a required minimum bolt tension by the degree
of direct tension indicator plastic deformation. Hereafter re-
1.4 The following precautionary statement pertains only to
ferred to as direct tension indicator.
thetestmethodsportions,Section12,andAppendixX1ofthis
specification: This standard does not purport to address all of
4. Ordering Information
the safety concerns, if any, associated with its use. It is the
4.1 Orders for direct tension indicators under this specifica-
responsibility of the user of this standard to establish appro-
tion shall include the following:
priate safety and health practices and determine the applica-
4.1.1 Quantity (number of pieces);
bility of regulatory limitations prior to use.
4.1.2 Name of product (direct tension indicator);
2. Referenced Documents
4.1.3 Size, that is, nominal diameter;
2
4.1.4 ASTM designation and year of issue (if not specified,
2.1 ASTM Standards:
current issue shall be used);
A325M Specification for Structural Bolts, Steel, Heat
4.1.5 Type required, 8.8 or 10.9 (see 1.2);
Treated 830 MPa Minimum Tensile Strength (Metric)
4.1.6 Coating type, if required (see 5.4);
F436MSpecification for Hardened Steel Washers (Metric)
4.1.7 Source inspection, if required (Section 13);
A490MSpecification for High-Strength Steel Bolts, Classes
4.1.8 Certificates of compliance or test reports, if required
10.9 and 10.9.3, for Structural Steel Joints (Metric)
(Section 15); and
B695Specification for Coatings of Zinc Mechanically De-
4.1.9 Any special requirements.
posited on Iron and Steel
5. Materials and Manufacture
1
This specification is under the jurisdiction of ASTM Committee F16 on
5.1 Steel used in the manufacture of direct tension indica-
Fasteners and is the direct responsibility of Subcommittee F16.02Steel Bolts, Nuts,
tors shall be produced by the basic-oxygen or electric-furnace
Rivets and Washers.
Current edition approved Dec. 1, 2007. Published January 2008. Originally
process.
approved in 1994. Last previous edition approved in 2006 as F959M–06. DOI:
5.2 Design:
10.1520/F0959M-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from Research Council on Structural Connections at www.boltcoun-
the ASTM website. cil.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F959M−07
TABLE 2 Direct Tension Indicator Gap for Compression Load
5.2.1 Direct tension indicators shall have a configuration
Testing
produced by extrusion, punching, pressing, or similar forming,
Gap, mm
to permit a measurable decrease in thickness when placed in
Direct Tension Indicator Finish
Specification Specification
compression.
8.8 10.9
5.2.2 The design shall be such
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
METRIC
DESIGNATION:F959M–07
Designation:F959M–06
Standard Specification for
Compressible-Washer-Type Direct Tension Indicators for
1
Use With Structural Fasteners [Metric]
This standard is issued under the fixed designation F 959M; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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 A 325M bolts, and
1.2.2 Type 10.9—direct tension indicators for use with Specification A 490M 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 A 325 or A 490 Bolts.)
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A 325M Specification for Structural Bolts, Steel, Heat Treated 830 MPa Minimum Tensile Strength [Metric]
F 436M Specification for Hardened Steel Washers [Metric]
A 490M Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints [Metric]
B 695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
D 3951 Practice for Commercial Packaging
F 606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers,
and Rivets [Metric]
F 1470 Guide for Fastener Sampling for Specified Mechanical Properties and Performance Inspection
2.2 Research Council on Structural Connections Standard:
Specification for Structural Joints Using ASTM A 325 or A 490 Bolts
3
Specification for Structural Joints Using ASTM A 325 or A 490 Bolts
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 compressible-washer-type direct tension indicator, n—a washer-type element inserted under the bolt head or hardened
washer, having the capability of indicating the achievement of a required minimum bolt tension by the degree of direct tension
indicator plastic deformation. Hereafter referred to as direct tension indicator.
4. Ordering Information
4.1 Orders for direct tension indicators under this specification shall include the following:
4.1.1 Quantity (number of pieces);
4.1.2 Name of product (direct tension indicator);
1
This specification is under the jurisdiction ofASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.02 Steel Bolts, Nuts, Rivets and
Washers.
Current edition approved Nov.Dec. 1, 2006.2007. Published November 2006.January 2008. Originally approved in 1994. Last previous edition approved in 20042006 as
F 959M – 046.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Research Council on Structural Connections at www.boltcouncil.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F959M–07
4.1.3 Size, that is, nominal diameter;
4.1.4 ASTM designation and year of issue (if not specified, current issue shall be used);
4.1.5 Type required, 8.8 or 10.9 (see 1.2);
4.1.6 Coating type, if required (see 5.4);
4.1.7 Source inspection, if required (Section 13);
4.1.8 Certificates of compliance or test reports, if required (Section 15); and
4.1.9 Any special requirements.
5. Materials and Manufacture
5.1 Steel used in the m
...