Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use

ABSTRACT
This specification2 covers quenched and tempered steel hex cap screws, bolts, and studs having a minimum tensile strength. The fasteners are intended for general engineering use. Type 1 fasteners shall be plain carbon steel, carbon boron steel, alloy steel, or alloy boron steels conforming to the requirements. Type 3 fasteners shall be weathering steel and shall conform to one of the chemical compositions specified. Tensile strength, proof load, hardness tests, and axial tension tests shall be performed to conform with the specified requirements.
SCOPE
1.1 This specification2 covers quenched and tempered steel hex cap screws, bolts, and studs having a minimum tensile strength of 120 ksi for diameters 1.0 in. and smaller; 105 ksi for diameters over 1.0 in. to 11/2 in.; and 90 ksi for diameters 13/4 in. to 3.0 in. inclusive. The term "fasteners" in this specification denotes hex cap screws, bolts, and studs.  
1.2 The fasteners are intended for general engineering use.  
1.3 The fasteners are furnished in diameters 1/4 to 3.0 in. inclusive. They are designated by type denoting chemical composition as follows:  
Type  
Description    
Type I  
Plain carbon steel, carbon boron steel, alloy steel, or alloy boron steel    
Type 2  
Withdrawn 2003    
Type 3  
Weathering steel  
1.4 Terms used in this specification are defined in Terminology F1789 unless otherwise defined in this specification.  
1.5 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Publication Date
30-Nov-2020
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ASTM A449-14(2020) - Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:A449 −14 (Reapproved 2020)
Standard Specification for
Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/
1
105/90 ksi Minimum Tensile Strength, General Use
This standard is issued under the fixed designation A449; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 2. Referenced Documents
2 3
1.1 This specification covers quenched and tempered steel 2.1 ASTM Standards:
hex cap screws, bolts, and studs having a minimum tensile A563Specification for Carbon and Alloy Steel Nuts
strengthof120ksifordiameters1.0in.andsmaller;105ksifor A751Test Methods, Practices, and Terminology for Chemi-
1 3
diameters over 1.0 in. to 1 ⁄2 in.; and 90 ksi for diameters 1 ⁄4 cal Analysis of Steel Products
in.to3.0in.inclusive.Theterm "fasteners"inthisspecification B695Specification for Coatings of Zinc Mechanically De-
denotes hex cap screws, bolts, and studs. posited on Iron and Steel
F436/F436MSpecification for Hardened SteelWashers Inch
1.2 The fasteners are intended for general engineering use.
and Metric Dimensions
1
1.3 The fasteners are furnished in diameters ⁄4 to 3.0 in.
F606/F606MTest Methods for Determining the Mechanical
inclusive. They are designated by type denoting chemical
Properties of Externally and Internally Threaded
composition as follows:
Fasteners, Washers, Direct Tension Indicators, and Rivets
Type Description
F788/F788MSpecification for Surface Discontinuities of
Bolts, Screws, Studs, and Rivets, Inch and Metric Series
Type I Plain carbon steel, carbon boron steel, alloy
F1470Practice for Fastener Sampling for Specified Me-
steel, or alloy boron steel
Type 2 Withdrawn 2003
chanical Properties and Performance Inspection
Type 3 Weathering steel
F1789Terminology for F16 Mechanical Fasteners
1.4 Terms used in this specification are defined in Termi-
F2329Specification for Zinc Coating, Hot-Dip, Require-
nology F1789 unless otherwise defined in this specification.
ments for Application to Carbon and Alloy Steel Bolts,
Screws, Washers, Nuts, and Special Threaded Fasteners
1.5 Thevaluesstatedininch-poundunitsaretoberegarded
G101Guide for Estimating the Atmospheric Corrosion Re-
asstandard.Nootherunitsofmeasurementareincludedinthis
sistance of Low-Alloy Steels
standard.
4
2.2 ASME Standards:
1.6 This standard does not purport to address all of the
B1.1Unified Screw Threads
safety concerns, if any, associated with its use. It is the
B18.2.1 Square and Hex Bolts and Screws
responsibility of the user of this standard to establish appro-
B18.24Part Identifying Number (PIN) Code System Stan-
priate safety, health, and environmental practices and deter-
dard for B18 Fastener Products
mine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accor-
3. Ordering Information
dance with internationally recognized principles on standard-
3.1 Orders for fasteners under this specification shall in-
ization established in the Decision on Principles for the
clude the following:
Development of International Standards, Guides and Recom-
3.1.1 Quantity (number of pieces),
mendations issued by the World Trade Organization Technical
3.1.2 Size, including nominal diameter and length,
Barriers to Trade (TBT) Committee.
3.1.3 Name of product,
1
This specification is under the jurisdiction of ASTM Committee F16 on
3
Fastenersand is the direct responsibility of Subcommittee F16.02 on Steel Bolts, For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Nuts, Rivets and Washers. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Dec. 1, 2020. Published December 2020. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1963. Last previous edition approved in 2014 as A449–14. DOI: the ASTM website.
4
10.1520/A0449-14R20. Available from American Society of Mechanical Engineers (ASME), ASME
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
cations SA-449 in Section II of that Code. www.asme.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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