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  <xs:element id="msm_RetailWholesaleMember" abstract="false" name="RetailWholesaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_CommercialMember" abstract="false" name="CommercialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_OtherCustomersMember" abstract="false" name="OtherCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_NationalAccountCustomersMember" abstract="true" name="NationalAccountCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_PublicSectorCustomersMember" abstract="true" name="PublicSectorCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_CoreAndOtherCustomersMember" abstract="true" name="CoreAndOtherCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_PurchasersMember" abstract="true" name="PurchasersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_AccountsReceivableIncreaseDecreaseInAmountAuthorizedForSale" abstract="false" name="AccountsReceivableIncreaseDecreaseInAmountAuthorizedForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccountsReceivableAmountAuthorizedForSale" abstract="false" name="AccountsReceivableAmountAuthorizedForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccountsReceivableCollateralUnsoldReceivablesAmount" abstract="false" name="AccountsReceivableCollateralUnsoldReceivablesAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccountsReceivableSalesTransactionsFees" abstract="false" name="AccountsReceivableSalesTransactionsFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_ReceivablesPurchaseAgreementMember" abstract="true" name="ReceivablesPurchaseAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_Wm.F.HurstCo.LLCMember" abstract="true" name="Wm.F.HurstCo.LLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_MSCIndustrialSupplySDeRLDeCVMember" abstract="true" name="MSCIndustrialSupplySDeRLDeCVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_MSCImportExportLLCMember" abstract="true" name="MSCImportExportLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_SettlementOfIndebtednessThroughTransferOfInventoryMember" abstract="true" name="SettlementOfIndebtednessThroughTransferOfInventoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_NoncontrollingInterestOwnershipPercentageAcquired" abstract="false" name="NoncontrollingInterestOwnershipPercentageAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="msm_CustomerFulfillmentCenterMember" abstract="true" name="CustomerFulfillmentCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_ImpairmentTypeAxis" abstract="true" name="ImpairmentTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="msm_ImpairmentTypeDomain" abstract="true" name="ImpairmentTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_DigitalCoreImplementationProjectMember" abstract="true" name="DigitalCoreImplementationProjectMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_UnpaidContractualObligationsForHostingFeesPreTaxCharge" abstract="false" name="UnpaidContractualObligationsForHostingFeesPreTaxCharge" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_DeferredTaxAssetsAccountsReceivable" abstract="false" name="DeferredTaxAssetsAccountsReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_DeferredTaxAssetsOperatingLeaseLiability" abstract="false" name="DeferredTaxAssetsOperatingLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_DeferredTaxAssetsSelfInsuranceLiability" abstract="false" name="DeferredTaxAssetsSelfInsuranceLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_DeferredTaxAssetsValuationAllowanceRollForward" abstract="true" name="DeferredTaxAssetsValuationAllowanceRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="msm_CoronavirusAidReliefAndEconomicSecurityActMember" abstract="false" name="CoronavirusAidReliefAndEconomicSecurityActMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_ExpiresIn2034Member" abstract="true" name="ExpiresIn2034Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_EmployeeRetentionCreditCARESAct" abstract="false" name="EmployeeRetentionCreditCARESAct" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_OperatingLossCarryforwardsIndefiniteCarryforward" abstract="false" name="OperatingLossCarryforwardsIndefiniteCarryforward" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_OperatingLossCarryforwardsSubjectToExpiration" abstract="false" name="OperatingLossCarryforwardsSubjectToExpiration" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedSalesRebatesAndReturnsCurrent" abstract="false" name="AccruedSalesRebatesAndReturnsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedRestructuringAndOtherRelatedCostsCurrent" abstract="false" name="AccruedRestructuringAndOtherRelatedCostsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedDividendEquivalentsCurrent" abstract="false" name="AccruedDividendEquivalentsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedFreightCurrent" abstract="false" name="AccruedFreightCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedLegalFeesCurrent" abstract="false" name="AccruedLegalFeesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedERCClaimsCurrent" abstract="false" name="AccruedERCClaimsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedContractualObligationsCurrent" abstract="false" name="AccruedContractualObligationsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AccruedConsiderationRelatedToAcquisitionsCurrent" abstract="false" name="AccruedConsiderationRelatedToAcquisitionsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_CommittedCreditFacilityMember" abstract="false" name="CommittedCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_UncommittedCreditFacilityMember" abstract="false" name="UncommittedCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_PrivatePlacementDebtMember" abstract="false" name="PrivatePlacementDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_SeniorNotesDueJuly282026Member" abstract="false" name="SeniorNotesDueJuly282026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_SeniorNotesDueMarch52027Member" abstract="false" name="SeniorNotesDueMarch52027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_SeniorNotesDueApril182027Member" abstract="false" name="SeniorNotesDueApril182027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_SeniorNotesDueAugust272029Member" abstract="true" name="SeniorNotesDueAugust272029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_SeniorNotesDueAugust272031Member" abstract="true" name="SeniorNotesDueAugust272031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_FinancingObligations" abstract="false" name="FinancingObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_FinancingObligationsCurrent" abstract="false" name="FinancingObligationsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_AmendedRevolvingCreditFacilityMember" abstract="false" name="AmendedRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_AmendedUncommittedFacilitiesMember" abstract="false" name="AmendedUncommittedFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_PrivatePlacementDebtAndShelfFacilityAgreementsMember" abstract="false" name="PrivatePlacementDebtAndShelfFacilityAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_PrivatePlacementDebtAndAmendedRevolvingCreditFacilityMember" abstract="true" name="PrivatePlacementDebtAndAmendedRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_AvailableIncreaseInAggregateAmountBorrowed" abstract="false" name="AvailableIncreaseInAggregateAmountBorrowed" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_NumberOfCreditFacilities" abstract="false" name="NumberOfCreditFacilities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="msm_DebtCovenantConsolidatedLeverageRatioMaximum" abstract="false" name="DebtCovenantConsolidatedLeverageRatioMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="msm_DebtCovenantConsolidatedLeverageRatioAfterMaterialAcquisitionMaximum" abstract="false" name="DebtCovenantConsolidatedLeverageRatioAfterMaterialAcquisitionMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="msm_DebtCovenantConsolidatedInterestCoverageRatioMinimum" abstract="false" name="DebtCovenantConsolidatedInterestCoverageRatioMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="msm_VariableLeaseCostBenefit" abstract="false" name="VariableLeaseCostBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseRightOfUseAssets" abstract="false" name="LeaseRightOfUseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiability" abstract="false" name="LeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentDueAbstract" abstract="true" name="LeaseLiabilityPaymentDueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentsDueYearOne" abstract="false" name="LeaseLiabilityPaymentsDueYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentsDueYearTwo" abstract="false" name="LeaseLiabilityPaymentsDueYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentsDueYearThree" abstract="false" name="LeaseLiabilityPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentsDueYearFour" abstract="false" name="LeaseLiabilityPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentsDueYearFive" abstract="false" name="LeaseLiabilityPaymentsDueYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentsDueAfterYearFive" abstract="false" name="LeaseLiabilityPaymentsDueAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityPaymentDue" abstract="false" name="LeaseLiabilityPaymentDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_LeaseLiabilityUndiscountedExcessAmount" abstract="false" name="LeaseLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_ComponentsOfShareholdersEquityTable" abstract="true" name="ComponentsOfShareholdersEquityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="msm_ShareRepurchaseProgramMember" abstract="false" name="ShareRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_ComponentsOfShareholdersEquityLineItems" abstract="true" name="ComponentsOfShareholdersEquityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="msm_TreasuryStockRepurchasedAndRetiredShares" abstract="false" name="TreasuryStockRepurchasedAndRetiredShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="msm_TreasuryStockRepurchasedAndRetiredAmount" abstract="false" name="TreasuryStockRepurchasedAndRetiredAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_TwoThousandTwentyThreeOmnibusIncentivePlanMember" abstract="true" name="TwoThousandTwentyThreeOmnibusIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_AssociateStockPurchasePlanMember" abstract="false" name="AssociateStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_SavingsPlanMember" abstract="false" name="SavingsPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_IncrementalDividendRightsRestrictedStockUnitsMember" abstract="false" name="IncrementalDividendRightsRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_IncrementalDividendRightsPerformanceStockUnitsMember" abstract="false" name="IncrementalDividendRightsPerformanceStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustment" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustment" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="msm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdjustmentWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="msm_RestructuringChargesConsultingRelatedCosts" abstract="false" name="RestructuringChargesConsultingRelatedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_ConsultingRelatedCostsMember" abstract="false" name="ConsultingRelatedCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_OtherExitRelatedCostsMember" abstract="false" name="OtherExitRelatedCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_ConsultingAndSeveranceCosts" abstract="false" name="ConsultingAndSeveranceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_ReportableSegmentMember" abstract="true" name="ReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="msm_FreightExpense" abstract="false" name="FreightExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="msm_OperatingMargin" abstract="false" name="OperatingMargin" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
</xs:schema>
