ASTM F959M-01a

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Designation: F 959M – 01a
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.
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1. Scope * D 3951 Practice for Commercial Packaging
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E 4 Practices for Load Verification of Testing Machines
1.1 This specification covers the requirements for
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F 436M Specification for Hardened Steel Washers [Metric]
compressible-washer-type direct tension indicators capable of
F 1470 Guide for Fastener Sampling for Specified Mechani-
indicating the achievement of a specified minimum bolt tension
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cal Properties and Performance Inspection
in a structural bolt.
2.2 Research Council on Structural Connections Standard:
1.2 Two types of direct tension indicators in nominal
Specification for Structural Joints Using ASTM A 325 or A
diameter sizes M16 through M36 are covered:
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490 Bolts
1.2.1 Type 8.8—Direct tension indicators for use with
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2.3 ANSI Standards:
Specification A 325M bolts, and
B 18.2.3.7M Metric Heavy Hex Structural Bolts
1.2.2 Type 10.9—Direct tension indicators for use with
B 18.2.3.4.6M Metric Heavy Hex Nuts
Specification A 490M bolts.
1.3 Direct tension indicators are intended for installation
3. Terminology
under either a bolt head or a hardened washer. (See Research
3.1 Definitions of Terms Specific to This Standard:
Council on Structural Connections: Specification for Structural
3.1.1 compressible-washer-type direct tension indicator—a
Joints Using ASTM A 325 or A 490 Bolts.)
washer-type element inserted under the bolt head or hardened
1.4 The following precautionary statement pertains only to
washer, having the capability of indicating the achievement of
the test methods portion, Section 12 and Annex A1, of this
a required minimum bolt tension by the degree of direct tension
specification: This standard does not purport to address all of
indicator plastic deformation. Hereinafter referred to as direct
the safety concerns, if any, associated with its use. It is the
tension indicator.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Ordering Information
bility of regulatory limitations prior to use.
4.1 Orders for direct tension indicators under this specifica-
2. Referenced Documents tion shall include the following:
4.1.1 Quantity (number of pieces);
2.1 ASTM Standards:
4.1.2 Name of product (direct tension indicator);
A 325M Specification for Structural Bolts, Steel, Heat-
2 4.1.3 Size, that is, nominal diameter;
Treated, 120/105 ksi Minimum Tensile Strength [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;
Classes 10.9 and 10.9.3, for Structural Steel Joints [Met-
2 4.1.5 Type required, 8.8 or 10.9 (see 1.2);
ric]
2 4.1.6 Coating type, if required (see 5.4);
A 563 Specification for Carbon and Alloy Steel Nuts
4.1.7 Source inspection, if required (Section 13);
B 695 Specification for Coatings of Zinc Mechanically
2 4.1.8 Certificates of compliance or test reports, if required
Deposited on Iron and Steel
(Section 15); and
4.1.9 Any special requirements.
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This specification is under the jurisdiction of ASTM Committee F16 on
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Fasteners and is the direct responsibility of Subcommittee F16.02 Steel Bolts, Nuts, Annual Book of ASTM Standards, Vol 15.09.
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Rivets, and Washers. Annual Book of ASTM Standards, Vol 03.01.
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Current edition approved Oct. 10, 2001. Published December 2001. Originally Available from Research Council on Structural Connections, c/o Industrial
published as F 959M – 94. Last previous edition F 959M – 01. Fasteners Institute, 1717 East 9th Street, Cleveland, OH 44114.
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Annual Book of ASTM Standards, Vol 01.08. Available from American National Standards Institute, 11 West 42nd St., 13th
Floor, New York, NY 10036.
*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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F 959M
TABLE 2 Direct Tension Indicator Gap for Compression Load
5. Materials and Manufacture
Testing
5.1 Steel used in the manufacture of direct tension indica-
tors shall be produced by the basic-oxygen or electric-furnace
Gap, mm
process.
Direct Tension Indicator Finish
Specification Specification
5.2 Design:
8.8 10.9
5.2.1 Direct tension indicators shall have a configuration
Plain finish
...