美国机械工程师手册_26663_yj3.pdf

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1、1520METRICFASTENERSMETRICFASTENERSAnumberofAmericanNationalStandardscoveringmetricbolts,screws,nuts,andwashershavebeenestablishedincooperationwiththeDepartmentofDefenseinsuchawaythattheycouldbeusedbytheGovernmentforprocurementpurposes.Extensiveinformatio

2、nconcerningthesemetricfastenersisgiveninthefollowingtextandtables,butforadditionalmanufacturingandacceptancespecificationsreferenceshouldbemadetotherespectiveStandardswhichmaybeobtainedbynongovernmentalagenciesfromtheAmericanNationalStandardsInstitute,11

3、West42ndStreet,NewYork,N.Y.10036.TheseStandardsare:ANSIB18.2.3.1M-1979(R1989)MetricHexCapScrewsTable1ANSIB18.2.3.2M-1979(R1989)MetricFormedHexScrewsTable2ANSIB18.2.3.3M-1979(R1989)MetricHeavyHexScrewsTable3ANSIB18.2.3.4M-1984MetricHexFlangeScrewsTable7AN

4、SIB18.2.3.5M-1979(R1989)MetricHexBoltsTable12ANSIB18.2.3.6M-1979(R1989)MetricHeavyHexBoltsTable10ANSIB18.2.3.7M-1979(R1989)MetricHeavyHexStructuralBoltsTable11ANSIB18.2.3.8M-1981(R1991)MetricHexLagScrewsTable5ANSIB18.2.3.9M-1984MetricHeavyHexFlangeScrews

5、Table6ANSIB18.5.2.2M-1982MetricRoundHeadSquareNeckBoltsTable9ANSIB18.3.1M-1986SocketHeadCapScrews(MetricSeries)Table23ANSIB18.2.4.1M-1979(R1989)MetricHexNuts,Style1Table26ANSIB18.2.4.2M-1979(R1989)MetricHexNuts,Style2Table26ANSIB18.2.4.3M-1979(R1989)Metr

6、icSlottedHexNutsTable27ANSIB18.2.4.4M-1982MetricHexFlangeNutsTable28ANSIB18.2.4.5M-1979MetricHexJamNutsTable31ANSIB18.2.4.6M-1979(R1990)MetricHeavyHexNutsTable31ANSIB18.16.3M-1998Prevailing-TorqueMetricHexNutsTable29ANSIB18.16.3M-1998Prevailing-TorqueMet

7、ricHexFlangeNutsTable30ANSIB18.22M-1981(R1990)MetricPlainWashersTable32Manufacturersshouldbeconsultedconcerningwhichitemsandsizesareinstockpro-duction.ComparisonwithISOStandards.—AmericanNationalStandardsformetricbolts,screwsandnutshavebeencoordinatedtot

8、heextentpossiblewiththecomparableISOStandardsorproposedStandards.ThedimensionaldifferencesbetweentheANSIandthecomparableISOStandardsorproposedStandardsarefew,relativelyminor,andnonewillaffectthefunctionalinterchangeability