1、Designation:F959/F959M17aStandard Specification forCompressible-Washer-Type Direct Tension Indicators forUse with Structural Fasteners,Inch and Metric Series1This standard is issued under the fixed designation F959/F959M;the number immediately following the designation indicates the yearof original
2、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*1.1 Thisspecificationcoverstherequirementsforcompressible-washer-type direct
3、tension indicators,(DTIs)capable of indicating the achievement of a specified minimumtension in a structural bolting assembly.1.2 Eight types of DTIs in nominal diameter sizes12through 112in.as well as M16 through M36 are covered:1.2.1 Type 325-1DTIs for use with Specification F3125Grade A325 Type 1
4、 bolts or Grade F1852 assemblies.1.2.2 Type 3253DTIs for use with Specification F3125Grade A325 Type 3 bolts or Grade F1852 Type 3 assemblies.1.2.3 Type 4901DTIs for use with Specification F3125Grade A490 Type 1 bolts or Grade F2280 assemblies.1.2.4 Type 4903DTIs for use with Specification F3125Grad
5、e A490 Type 3 bolts Grade F2280 Type 3 assemblies.1.2.5 Type 8.8-1DTIs for use with Specification F3125Grade A325M Type 1 bolts.1.2.6 Type 8.8-3DTIs for use with Specification F3125Grade A325M Type 3 bolts.1.2.7 Type 10.9-1DTIs for use with Specification F3125Grade A490M Type 1 bolts.1.2.8 Type 10.9
6、-3DTIs for use with Specification F3125Grade A490M Type 3 bolts.1.3 DTIs are intended for installation with the protrusionsagainst a hardened surface such as a bolt head,a hardened nut,or a hardened washer.(See Research Council on StructuralConnections:Specification for Structural Joints Using High-
7、Strength Bolts.)1.4 This specification provides for furnishing Type 3 DTIsto a Chemical Composition Requirement or a CorrosionResistance Index(CRI)at the manufacturers discretion.1.5 Terms used in this specification are defined in Termi-nology F1789 unless otherwise specified.1.6 The values stated i
8、n either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.7 The follow
9、ing precautionary statement pertains only tothe test method portions,Section 10 and Appendix X1 of thisspecification:This standard does not purport to address all ofthe safety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safet
10、y,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Int
11、ernational Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A325 Specification for Structural Bolts,Steel,Heat Treated,120/105 ksi Minimum Tensile Strength(Withdrawn2016)3A325M Specificatio
12、n for Structural Bolts,Steel,HeatTreated 830 MPa Minimum Tensile Strength(Metric)(Withdrawn 2016)3A490 Specification for Structural Bolts,Alloy Steel,HeatTreated,150 ksi Minimum Tensile Strength(Withdrawn2016)3A490M Specification for High-Strength Steel Bolts,Classes10.9 and 10.9.3,for Structural St
13、eel Joints(Metric)(Withdrawn 2016)3A1059 Specification for Zinc Alloy Thermo-Diffusion Coat-ings(TDC)on Steel Fasteners,Hardware,and OtherProducts1This specification is under the jurisdiction of ASTM Committee F16 onFasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts,Nut
14、s,Rivets and Washers.Current edition approved Dec.1,2017.Published February 2018.Originallyapproved in 1985.Last previous edition approved in 2017 as F959 17.DOI:10.1520/F0959-17A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.Fo
15、r Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr
16、 Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 B695 Specification for Coatings of Zinc Mechanically De-posited on Iron and SteelF436/F436M Specification for Har
