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  <xs:element id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesGreaterThanOrEqualTo50PercentMember" abstract="true" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesGreaterThanOrEqualTo50PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan50PercentAndGreaterThanOrEqualTo20PercentMember" abstract="true" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan50PercentAndGreaterThanOrEqualTo20PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan20PercentAndGreaterThanOrEqualToNegative20PercentMember" abstract="true" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThan20PercentAndGreaterThanOrEqualToNegative20PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="nx_ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThanNegative20PercentMember" abstract="true" name="ShareBasedCompensationAwardPerformanceCriteriaAbsoluteTotalShareholderReturnMilestonesLessThanNegative20PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="nx_PerformanceRestrictedStockUnitsSettledInCash" abstract="false" name="PerformanceRestrictedStockUnitsSettledInCash" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="nx_PensionServiceBenefit" abstract="false" name="PensionServiceBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nx_NAEngineeredComponentsMember" abstract="true" name="NAEngineeredComponentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="nx_EarningsPerShareDisclosureTable" abstract="true" name="EarningsPerShareDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="nx_EarningsPerShareDisclosureLineItems" abstract="true" name="EarningsPerShareDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="nx_AmendedCreditAgreementMember" abstract="true" name="AmendedCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_SwingLineSubFacilityMember" abstract="true" name="SwingLineSubFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_AlternativeCurrencySubFacilityMember" abstract="true" name="AlternativeCurrencySubFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nx_GeorgeWilsonMember" abstract="true" name="GeorgeWilsonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
