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  <xs:element id="nnbr_CorporateAndConsolidationsMember" abstract="true" name="CorporateAndConsolidationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="nnbr_InterestRateSwapDecember312020toDecember302021Member" abstract="true" name="InterestRateSwapDecember312020toDecember302021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="nnbr_TemporaryEquityIncreaseinDividendRatePercentage" abstract="false" name="TemporaryEquityIncreaseinDividendRatePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="nnbr_COVID19Member" abstract="true" name="COVID19Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="nnbr_IncreaseDecreaseInOperatingLeaseLiabilityCurrent" abstract="false" name="IncreaseDecreaseInOperatingLeaseLiabilityCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nnbr_GainLossOnDerivativesAndOtherNonoperatingIncomeExpenseNet" abstract="false" name="GainLossOnDerivativesAndOtherNonoperatingIncomeExpenseNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nnbr_DebtInstrumentLIBORFloorRate" abstract="false" name="DebtInstrumentLIBORFloorRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
</xs:schema>
