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  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001390378</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000764401</issuerCik>
      <issuerName>INSTEEL INDUSTRIES INC</issuerName>
      <secFileNumber>001-09929</secFileNumber>
      <issuerAddress>
        <com:street1>1373 BOGGS DR</com:street1>
        <com:city>MOUNT AIRY</com:city>
        <com:stateOrCountry>NC</com:stateOrCountry>
        <com:zipCode>27030</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>3367862141</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Wagner Richard</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corp.</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1715</noOfUnitsSold>
      <aggregateMarketValue>62203.00</aggregateMarketValue>
      <noOfUnitsOutstanding>19448318</noOfUnitsOutstanding>
      <approxSaleDate>02/29/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/13/2024</acquiredDate>
      <natureOfAcquisitionTransaction>Vested RSUs</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1715</amountOfSecuritiesAcquired>
      <paymentDate>02/13/2024</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>03/01/2024</noticeDate>
      <signature>Richard T Wagner</signature>
    </noticeSignature>
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144
0001390378
XXXXXXXX
LIVE
0000764401
INSTEEL INDUSTRIES INC
001-09929
1373 BOGGS DR
MOUNT AIRY
NC
27030
3367862141
Wagner Richard
Officer
Common
Charles Schwab Corp.
3000 Schwab Way
Westlake
TX
76262
1715
62203.00
19448318
02/29/2024
NYSE
Common
02/13/2024
Vested RSUs
Issuer
N
1715
02/13/2024
Equity Compensation
Y
03/01/2024
Richard T Wagner