ASTM F2280-11
(Specification)Standard Specification for “Twist Off” Type Tension Control Structural Bolt/Nut/Washer Assemblies, Steel, Heat Treated, 150 ksi Minimum Tensile Strength
Standard Specification for <span class='unicode'>“</span>Twist Off<span class='unicode'>”</span> Type Tension Control Structural Bolt/Nut/Washer Assemblies, Steel, Heat Treated, 150 ksi Minimum Tensile Strength
ABSTRACT
This specification covers two types of heat treated, steel, tension control bolt-nut-washer assemblies, also referred to as "sets," having a tensile strength of 150 to 173 ksi. These assemblies are capable of developing a minimum predetermined tension when installed by applying torque to the nut, while at the same time applying a counter torque to separate the spline end from the body of the bolt using an appropriate spline drive installation tool. The tension control bolts are designated by type denoting chemical composition as follows: type 1 - alloy steel, and type 3 - weathering steel. The chemical composition of the tension control bolts, nuts, and washers shall conform to the requirements specified. The assembly lot tension test shall be performed on fastener assemblies to determine the ability of the assembly to provide the required minimum tension. Tensile strength, proof load, hardness, and carburization/decarburization shall be tested to meet the requirements prescribed.
SCOPE
1.1 This specification covers two types of heat treated, steel, tension control bolt-nut-washer assemblies, also referred to as “sets,” having a tensile strength of 150 to 173 ksi. These assemblies are capable of developing a minimum predetermined tension when installed by applying torque to the nut, while at the same time applying a counter torque to separate the spline end from the body of the bolt using an appropriate spline drive installation tool.
1.2 An assembly consists of a tension control bolt with spline end (covered by this specification) and a suitable nut and washer covered by reference to applicable ASTM specifications.
1.3 The fastener assemblies are intended for use in structural connections. These connections, installation procedures, and the use of alternate design structural bolts are covered under the requirements of the “Specification for Structural Joints Using ASTM or A490 Bolts”, approved by the Research Council on Structural Connections.
1.4 The assemblies are available with either round (button or dome) heads, heavy hex structural heads, or alternate design heads described in Section 11 , in sizes ½ to 1 1/8 in. inclusive, in two types specified in Section 4.
1.5 Tension control bolts manufactured and marked in accordance with the requirements of Specification A490, and conforming to the dimensional and other requirements of this specification, will be considered an acceptable alternate under this specification for two years following initial publication.
1.6 The following precautionary statement pertains only to the test method portions, Sections 15 and 16, 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.
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Designation: F2280 – 11
Standard Specification for
“Twist Off” Type Tension Control Structural Bolt/Nut/Washer
Assemblies, Steel, Heat Treated, 150 ksi Minimum Tensile
1
Strength
This standard is issued under the fixed designation F2280; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This specification covers two types of heat treated,
steel, tension control bolt-nut-washer assemblies, also referred
2. Referenced Documents
to as “sets,” having a tensile strength of 150 to 173 ksi. These
2
2.1 ASTM Standards:
assemblies are capable of developing a minimum predeter-
A490 Specification for Structural Bolts, Alloy Steel, Heat
mined tension when installed by applying torque to the nut,
Treated, 150 ksi Minimum Tensile Strength
whileatthesametimeapplyingacountertorquetoseparatethe
A563 Specification for Carbon and Alloy Steel Nuts
splineendfromthebodyoftheboltusinganappropriatespline
A751 Test Methods, Practices, andTerminology for Chemi-
drive installation tool.
cal Analysis of Steel Products
1.2 An assembly consists of a tension control bolt with
E709 Guide for Magnetic Particle Testing
splineend(coveredbythisspecification)andasuitablenutand
E1444 Practice for Magnetic Particle Testing
washer covered by reference to applicable ASTM specifica-
F436 Specification for Hardened Steel Washers
tions.
F606 Test Methods for Determining the Mechanical Prop-
1.3 The fastener assemblies are intended for use in struc-
erties of Externally and Internally Threaded Fasteners,
tural connections. These connections, installation procedures,
Washers, Direct Tension Indicators, and Rivets
and the use of alternate design structural bolts are covered
F788/F788M Specification for Surface Discontinuities of
under the requirements of the “Specification for Structural
Bolts, Screws, and Studs, Inch and Metric Series
Joints UsingASTM orA490 Bolts”, approved by the Research
F1470 Practice for Fastener Sampling for Specified Me-
Council on Structural Connections.
chanical Properties and Performance Inspection
1.4 The assemblies are available with either round (button
F1789 Terminology for F16 Mechanical Fasteners
or dome) heads, heavy hex structural heads, or alternate design
F2328 Test Method for Determining Decarburization and
1 1
heads described in Section 11 , in sizes ⁄2 to 1 ⁄8 in. inclusive,
Carburization in Hardened and Tempered Threaded Steel
in two types specified in Section 4.
Bolts, Screws and Studs
1.5 Tension control bolts manufactured and marked in
G101 Guide for Estimating the Atmospheric Corrosion
accordance with the requirements of Specification A490, and
Resistance of Low-Alloy Steels
conforming to the dimensional and other requirements of this
3
2.2 ASME Standards:
specification, will be considered an acceptable alternate under
B1.1 Unified Inch Screw Threads
this specification for two years following initial publication.
B1.3M Screw Threads Gaging Systems for Dimensional
1.6 The following precautionary statement pertains only to
Acceptability—Inch and Metric Screw Threads
the test method portions, Sections 15 and 16, of this Specifi-
B18.2.6 Fasteners for Use in Structural Applications
cation: This standard does not purport to address all of the
4
2.3 Research Council on Structural Connections:
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
2
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
1
This specification is under the jurisdiction of ASTM Committee F16 on Standards volume information, refer to the standard’s Document Summary page on
Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, the ASTM website.
3
Nuts, Rivets and Washers. Available from American Society of Mechanical Engineers (ASME), ASME
Current edition approved May 1, 2011. Published May 2011. Originally International Headquarters, Three Park Ave., New York, NY 10016-5990.
´1 4
approved in 2006. Last previous edition approved in 2008 as F2280–08 . DOI: Available from American Institute of Steel Construction (AISC), One E.
10.1520/F2280-11. Wacker Dr., Suite 3100, Chicago, IL 60601-2001.
*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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F2280 – 11
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