ASTM F959M-99a

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 portion, 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: 09-Apr-2002
• ICS: 21.060.30 - Washers, locking elements
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.02 - Steel Bolts, Studs and Nuts

Relations

• Replaced By: ASTM F959M-01 - Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners [Metric]
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 959M – 99a
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.
1. Scope 2.2 Research Council on Structural Connections Standard:
Specification for Structural Joints Using ASTM A 325 or A
1.1 This specification covers the requirements for
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490 Bolts
compressible-washer-type direct tension indicators capable of
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2.3 ANSI Standards:
indicating the achievement of a specified minimum bolt tension
B 18.2.3.7M Metric Heavy Hex Structural Bolts
in a structural bolt.
B 18.2.3.4.6M Metric Heavy Hex Nuts
1.2 Two types of direct tension indicators in nominal
diameter sizes M16 through M36 are covered:
3. Terminology
1.2.1 Type 8.8—Direct tension indicators for use with
3.1 Definitions of Terms Specific to This Standard:
Specification A 325M bolts, and
3.1.1 compressible-washer-type direct tension indicator—a
1.2.2 Type 10.9—Direct tension indicators for use with
washer-type element inserted under the bolt head or hardened
Specification A 490M bolts.
washer, having the capability of indicating the achievement of
1.3 Direct tension indicators are intended for installation
a required minimum bolt tension by the degree of direct tension
under either a bolt head or a hardened washer. (See Appendix
indicator plastic deformation. Hereinafter referred to as direct
X1.)
tension indicator.
1.4 The following precautionary statement pertains only to
the test methods portion, Section 12, Annex A1, and Appendix
4. Ordering Information
X1 of this specification: This standard does not purport to
4.1 Orders for direct tension indicators under this specifica-
address all of the safety concerns, if any, associated with its
tion shall include the following:
use. It is the responsibility of the user of this standard to
4.1.1 Quantity (number of pieces);
establish appropriate safety and health practices and deter-
4.1.2 Name of product (direct tension indicator);
mine the applicability of regulatory limitations prior to use.
4.1.3 Size, that is, nominal diameter;
2. Referenced Documents 4.1.4 ASTM designation and year of issue, if not specified,
current issue shall be used;
2.1 ASTM Standards:
4.1.5 Type required, 8.8 or 10.9 (see 1.2);
A 325M Specification for Structural Bolts, Steel, Heat-
2 4.1.6 Coating type, if required (see 5.4);
Treated, 120/105 ksi Minimum Tensile Strength [Metric]
4.1.7 Source inspection, if required (Section 13);
A 490M Specification for High-Strength Steel Bolts,
4.1.8 Certificates of compliance or test reports, if required
Classes 10.9 and 10.9.3, for Structural Steel Joints [Met-
2 (Section 15); and
ric]
2 4.1.9 Any special requirements.
A 563 Specification for Carbon and Alloy Steel Nuts
B 695 Specification for Coatings of Zinc Mechanically
5. Materials and Manufacture
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Deposited on Iron and Steel
3 5.1 Steel used in the manufacture of direct tension indica-
D 3951 Practice for Commercial Packaging
tors shall be produced by the basic-oxygen or electric-furnace
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E 4 Practices for Load Verification of Testing Machines
2 process.
F 436M Specification for Hardened Steel Washers [Metric]
5.2 Design:
5.2.1 Direct tension indicators shall have a configuration
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produced by extrusion, punching, pressing, or similar forming,
This specification is under the jurisdiction of ASTM Committee F-16 on
Fasteners and is the direct responsibility of Subcommittee F16.02 Steel Bolts, Nuts,
Rivets, and Washers.
Current edition approved Oct. 10, 1999. Published December 1999. Originally
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published as F 959M – 94. Last previous edition F 959M – 99. Available from Research Council on Structural Connections, c/o Industrial
2
Annual Book of ASTM Standards, Vol 01.08. Fasteners Institute, 1717 East 9th Street, Cleveland, OH 44114.
3 6
Annual Book of ASTM Standards, Vol 15.09. Available from American National Standards Institute, 11 West 42nd St., 13th
4
Annual Book of ASTM Standards, Vol 03.01. Floor, New York, NY 10036.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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F 959M
TABLE 2 Direct Tension Indicator Gap for Compression Load
to permit a measurable decrease in thickness when placed in
Testing
compression.
5.2.2 The design shall be such that the degree of plastic
Gap, mm
deformation shall indicate the tension in a tightened structural
Direct Tension Indicator Finish
Specification Specification
bolt.
8.8 10.9
5.3 Heat Treatment—The process
...