1、Designation:A44914Standard Specification forHex Cap Screws,Bolts and Studs,Steel,Heat Treated,120/105/90 ksi Minimum Tensile Strength,General Use1This standard is issued under the fixed designation A449;the number immediately following the designation indicates the year oforiginal adoption or,in the
2、 case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript 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*1.1 This sp
3、ecification2covers quenched and tempered steelhex cap screws,bolts,and studs having a minimum tensilestrength of 120 ksi for diameters 1.0 in.and smaller;105 ksi fordiameters over 1.0 in.to 112in.;and 90 ksi for diameters 134in.to 3.0 in.inclusive.The term fasteners in this specificationdenotes hex
4、cap screws,bolts,and studs.1.2 The fasteners are intended for general engineering use.1.3 The fasteners are furnished in diameters14to 3.0 in.inclusive.They are designated by type denoting chemicalcomposition as follows:TypeDescriptionType IPlain carbon steel,carbon boron steel,alloysteel,or alloy b
5、oron steelType 2Withdrawn 2003Type 3Weathering steel1.4 Terms used in this specification are defined in Termi-nology F1789 unless otherwise defined in this specification.1.5 The values stated in inch-pound units are to be regardedas standard.No other units of measurement are included in thisstandard
6、.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Docu
7、ments2.1 ASTM Standards:3A563 Specification for Carbon and Alloy Steel NutsA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsB695 Specification for Coatings of Zinc Mechanically De-posited on Iron and SteelF436 Specification for Hardened Steel WashersF606 Test Metho
8、ds for Determining the Mechanical Proper-ties of Externally and Internally Threaded Fasteners,Washers,Direct Tension Indicators,and RivetsF788/F788M Specification for Surface Discontinuities ofBolts,Screws,and Studs,Inch and Metric SeriesF1470 Practice for Fastener Sampling for Specified Me-chanical
9、 Properties and Performance InspectionF1789 Terminology for F16 Mechanical FastenersF2329 Specification for Zinc Coating,Hot-Dip,Require-ments for Application to Carbon and Alloy Steel Bolts,Screws,Washers,Nuts,and Special Threaded FastenersG101 Guide for Estimating the Atmospheric Corrosion Re-sist
10、ance of Low-Alloy Steels2.2 ASME Standards:4B 1.1 Unified Screw ThreadsB 18.2.1 Square and Hex Bolts and ScrewsB 18.24 Part Identifying Number(PIN)Code System Stan-dard for B18 Fastener Products3.Ordering Information3.1 Orders for fasteners under this specification shall in-clude the following:3.1.1
11、 Quantity(number of pieces),3.1.2 Size,including nominal diameter and length,3.1.3 Name of product,3.1.4 Type,that is,Type 1,or Type 3 as required,1This specification is under the jurisdiction of ASTM Committee F16 onFastenersand is the direct responsibility of Subcommittee F16.02 on Steel Bolts,Nut
12、s,Rivets and Washers.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1963.Last previous edition approved in 2010 as A449 10.DOI:10.1520/A0449-14.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cations SA-449 in Section II of that Code.3For
13、referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from American Society of Mechanical Engineers(ASME),ASMEInte
14、rnational Headquarters,Three Park Ave.,New York,NY 10016-5990,http:/www.asme.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.5 ASTM designation and year of issue,and
15、3.1.6 Other components such as nuts and washers if re-quired.3.1.7 Hot-Dip or Mechanically Deposited Zinc CoatingsFor hot-dip or mechanically deposited zinc coatings covered by5.1 and requiring over-tapped nuts,specify the zinc coatingprocess required,that is,hot-dip,mechanically deposited,or nopref
16、erence(see 5.1).3.1.8 Other CoatingsSpecify other protective coating ifrequired(see 5.2).3.1.9 Specify if inspection at point of manufacture is re-quired.3.1.10 Test reports if required.3.1.11 Supplementary or special requirements.3.1.12 For establishment of a part identifying system,seeASME B18.24.NOTE1A typical ordering description follows:1000 pieces18in.diameter 4.0 in.long hex cap screw,Type 1,ASTM A449XX,eachwith one finished hex nut ASTM A563,Grade DH.Each componentmechanically zinc coate
