ASTM F959-99a

Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use with Structural Fasteners

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 1/2 through 1 1/2 in. are covered:
1.2.1 Type 325—direct tension indicators for use with Specification A 325 bolts, and
1.2.2 Type 490—direct tension indicators for use with Specification A 490 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 method portions, Section and 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: 21.060.01 - Fasteners in general
• Technical Committee: F16 - Fasteners
• Drafting Committee: F16.02 - Steel Bolts, Studs and Nuts

Relations

• Replaced By: ASTM F959-01 - Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use with Structural Fasteners
• Effective Date: 10-Apr-2002
• Referred By: ASTM F606/F606M-21 - Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
• 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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.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 959 – 99a
Standard Specification for
Compressible-Washer-Type Direct Tension Indicators for
1
Use with Structural Fasteners
This standard is issued under the fixed designation F 959; 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
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
1 1
diameter sizes ⁄2 through 1 ⁄2 in., are covered:
1.2.1 Type 325—direct tension indicators for use with A 325
bolts, and
1.2.2 Type 490—direct tension indicators for use with A 490
bolts.
1.3 Direct tension indicators are intended for installation
FIG. 1 Direct Tension Indicator Protrusion Tangential Diameter
under either a bolt head or a hardened washer. (See Appendix
(PTD)
X1.)
1.4 The following precautionary statement pertains only to
the test method portions, Section 12, Annex A1, and Appendix
Specification for Structural Joints Using ASTM A 325 or
6
X1, of this specification: This standard does not purport to
A 490 Bolts
7
address all of the safety concerns, if any, associated with its
2.3 ANSI Standards:
use. It is the responsibility of the user of this standard to
B 18.2.1 Square and Hex Bolts and Screws
establish appropriate safety and health practices and deter-
B 18.2.2 Square and Hex Nuts
mine the applicability of regulatory limitations prior to use.
3. Terminology
2. Referenced Documents
3.1 Definitions of Terms Specific to This Standard:
2.1 ASTM Standards:
3.1.1 compressible-washer-type direct tension indicator—a
A 325 Specification for Structural Bolts, Steel, Heat
washer-type element inserted under the bolt head or hardened
2
Treated, 120/105 ksi Minimum Tensile Strength
washer, having the capability of indicating the achievement of
A 490 Specification for Heat-Treated Steel Structural Bolts,
a required minimum bolt tension by the degree of direct tension
2
150 ksi Minimum Tensile Strength
indicator plastic deformation. Hereinafter referred to as direct
2
A 563 Specification for Carbon and Alloy Steel Nuts
tension indicator.
B 695 Specification for Coatings of Zinc Mechanically
3
4. Ordering Information
Deposited on Iron and Steel
4
D 3951 Practice for Commercial Packaging
4.1 Orders for direct tension indicators under this specifica-
5
E 4 Practices for Force Verification of Testing Machines tion shall include the following:
2
F 436 Specification for Hardened Steel Washers
4.1.1 Quantity (number of pieces);
2.2 Research Council on Structural Connections: 4.1.2 Name of product (direct tension indicator);
4.1.3 Size, that is, nominal diameter;
4.1.4 ASTM designation and year of issue, if not specified,
1
This specification is under the jurisdiction of ASTM Committee F-16 on current issue shall be used;
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
4.1.5 Type required, 325 or 490 (1.2);
Nuts, Rivets and Washers.
Current edition approved Oct. 10, 1999. Published December 1999. Originally
published as F 959 – 85. Last previous edition F 959 – 99.
2 6
Annual Book of ASTM Standards, Vol 01.08. Available from Research Council on Structural Connections, % Industrial
3
Annual Book of ASTM Standards, Vol 02.05. Fasteners Institute, 1717 East 9th Street, Cleveland, OH 44114.
4 7
Annual Book of ASTM Standards, Vol 15.09. Available from American National Standards Institute, 11 West 42nd St., 13th
5
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 959
4.1.6 Coating type, if required (5.4); tested in accordance with Annex A1 of this specification. When
4.1.7 Source inspection, if required (Section 13); compressed to the gap specified in Table 2, the compression
4.1.8 Certificates of compliance or test reports, if required
load shall conform to the requirements specified in Table 3.
(Section 15), and
7.2 Bolt Tension— See Appendix X1 for field tests to ensure
4.1.9 Any special requirements.
that the desired minimum bolt tension has been achieved.
5. Materials and Manufacture
8. Dimensions
5.1 Steel used in the manufacture of direct tension indica-
8.1 The direct tension indicators shall conform to the
tors shall be produced by the basic-oxygen or electric-furnace
dimensions specified in Table 4.
process.
5.2 Design:
9. Workmanship, Finish, and Appearance
5.2.1 Direct tension indicators shall have a configuration
...