ASTM F959M-06

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

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: 31-Oct-2006
• ICS: 21.060.30 - Washers, locking elements
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.02 - Steel Bolts, Studs and Nuts

Relations

• Replaces: ASTM F959M-04 - Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners [Metric]
• Effective Date: 01-Nov-2006
• Replaced By: ASTM F959M-07 - Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners [Metric]
• Effective Date: 01-Dec-2007

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F 959M – 06
METRIC
Standard Specification for
Compressible-Washer-Type Direct Tension Indicators for
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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* Classes10.9and10.9.3,forStructuralSteelJoints[Metric]
B 695 Specification for Coatings of Zinc Mechanically
1.1 This specification covers the requirements for
Deposited on Iron and Steel
compressible-washer-type direct tension indicators capable of
D 3951 Practice for Commercial Packaging
indicatingtheachievementofaspecifiedminimumbolttension
F 606M Test Methods for Determining the Mechanical
in a structural bolt.
Properties of Externally and InternallyThreaded Fasteners,
1.2 Two types of direct tension indicators in nominal
Washers, and Rivets [Metric]
diameter sizes M16 through M36 are covered:
F 1470 GuideforFastenerSamplingforSpecifiedMechani-
1.2.1 Type 8.8—direct tension indicators for use with Speci-
cal Properties and Performance Inspection
fication A 325M bolts, and
2.2 Research Council on Structural Connections Standard:
1.2.2 Type 10.9—direct tension indicators for use with
Specification for Structural Joints Using ASTM A 325 or A
Specification A 490M bolts.
3
490 Bolts
1.3 Direct tension indicators are intended for installation
under either a bolt head or a hardened washer. (See Research
3. Terminology
Council on Structural Connections: Specification for Structural
3.1 Definitions of Terms Specific to This Standard:
Joints Using ASTM A 325 or A 490 Bolts.)
3.1.1 compressible-washer-type direct tension indicator,
1.4 The following precautionary statement pertains only to
n—a washer-type element inserted under the bolt head or
the test methods portions, Section 12, andAppendix X1 of this
hardened washer, having the capability of indicating the
specification: This standard does not purport to address all of
achievement of a required minimum bolt tension by the degree
the safety concerns, if any, associated with its use. It is the
of direct tension indicator plastic deformation. Hereafter re-
responsibility of the user of this standard to establish appro-
ferred to as direct tension indicator.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Ordering Information
2. Referenced Documents 4.1 Orders for direct tension indicators under this specifica-
2 tion shall include the following:
2.1 ASTM Standards:
4.1.1 Quantity (number of pieces);
A 325M Specification for Structural Bolts, Steel, Heat
4.1.2 Name of product (direct tension indicator);
Treated 830 MPa Minimum Tensile Strength [Metric]
4.1.3 Size, that is, nominal diameter;
F 436M Specification for Hardened Steel Washers [Metric]
4.1.4 ASTM designation and year of issue (if not specified,
A 490M Specification for High-Strength Steel Bolts,
current issue shall be used);
4.1.5 Type required, 8.8 or 10.9 (see 1.2);
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4.1.6 Coating type, if required (see 5.4);
This specification is under the jurisdiction of ASTM Committee F16 on
Fasteners and is the direct responsibility of Subcommittee F16.02 Steel Bolts, Nuts,
4.1.7 Source inspection, if required (Section 13);
Rivets and Washers.
4.1.8 Certificates of compliance or test reports, if required
Current edition approved Nov. 1, 2006. Published November 2006. Originally
(Section 15); and
approved in 1994. Last previous edition approved in 2004 as F 959M – 04.
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.
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F959M–06
TABLE 1 Chemical Composition Requirements
Composition, %
Element
Heat Product
Analysis Analysis
Type 8.8-3 and Type Type 8.8 and Type Type 8.8-3 and Type
Type 8.8 and 10.9
A
10.9-3 10.9 10.9-3
Carbon 0.30–0.55 . 0.27–0.58 .
Manganese 0.50–0.90 . 0.47–0.93 .
Phosphorus, max 0.04 0.040 0.048 0.045
Sulfur, max 0.050 0.050 0.053 0.055
Silicon 0.15–0.35 0.15–0.35 0.13–0.37 0.13–0.37
Chromium . 0.45–0.65 . 0.42–0.68
Nickel . 0.25–0.45 . 0.22–0.48
Copper . 0.25–0.4
...