ASTM F959-04

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F 959 – 04
Standard Specification for
Compressible-Washer-Type Direct Tension Indicators for
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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
indicatingtheachievementofaspecifiedminimumbolttension
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
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
FIG. 1 Direct Tension Indicator Protrusion Tangential Diameter
under either a bolt head or a hardened washer. (See Research
(PTD)
Council on Structural Connections: Specification for Structural
Joints Using ASTM A 325 or A 490 Bolts.)
Washers, and Rivets
1.4 The following precautionary statement pertains only to
F 1470 GuideforFastenerSamplingforSpecifiedMechani-
the test method portions, Section 12 and Appendix X1 of this
cal Properties and Performance Inspection
specification: This standard does not purport to address all of
2.2 Research Council on Structural Connections:
the safety concerns, if any, associated with its use. It is the
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Specification for Structural Joints Using ASTM A 325 or
responsibility of the user of this standard to establish appro-
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A 490 Bolts
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3. Terminology
2. Referenced Documents
3.1 Definitions of Terms Specific to This Standard:
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3.1.1 compressible-washer-type direct tension indicator,
2.1 ASTM Standards:
n—washer-type element inserted under the bolt head or hard-
A 325 Specification for Structural Bolts, Steel, Heat
ened washer, having the capability of indicating the achieve-
Treated, 120/105 ksi Minimum Tensile Strength
ment of a required minimum bolt tension by the degree of
A 490 Specification for Structural Bolts, Alloy Steel, Heat
direct tension indicator plastic deformation. Hereafter referred
Treated, 150 ksi Minimum Tensile Strength
to as direct tension indicator.
B 695 Specification for Coatings of Zinc Mechanically
Deposited on Iron and Steel
4. Ordering Information
D 3951 Practice for Commercial Packaging
4.1 Orders for direct tension indicators under this specifica-
F 606 Test Methods for Determining the Mechanical Prop-
tion shall include the following:
erties of Externally and Internally Threaded Fasteners,
4.1.1 Quantity (number of pieces);
4.1.2 Name of product (direct tension indicator);
1 4.1.3 Size, that is, nominal diameter;
This specification is under the jurisdiction of ASTM Committee F16 on
4.1.4 ASTM designation and year of issue (if not specified,
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,
Nuts, Rivets, and Washers.
current issue shall be used);
Current edition approved Aug. 1, 2004. Published August 2004. Originally
4.1.5 Type required, 325 or 490 (1.2);
approved in 1985. Last previous edition approved in 2002 as F 959 – 02.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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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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F959–04
4.1.6 Coating type, if required (5.4); 7. Performance Requirements
4.1.7 Source inspection, if required (Section 13);
7.1 Compression Loads—When compressed to the gap
4.1.8 Certificates of compliance or test reports, if required
specified in Table 2, the compression load shall conform to the
(Section 15); and
requirements specified in Table 3.
4.1.9 Any special requirements.
8. Dimensions
5. Materials and Manufacture
8.1 The direct tension indicators shall conform to the
dimensions specified in Table 4.
5.1 Steel used in the manufacture of direct tension indica-
tors shall be produced by the basic-oxygen or electric-furnace
9. Workmanship, Finish, and Appearance
process.
9.1 The direct tension indicators shall be commercially
5.2 Design:
smooth and free of inj
...