<SEC-DOCUMENT>0001140361-18-017831.txt : 20180409
<SEC-HEADER>0001140361-18-017831.hdr.sgml : 20180409
<ACCEPTANCE-DATETIME>20180409163320
ACCESSION NUMBER:		0001140361-18-017831
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180401
FILED AS OF DATE:		20180409
DATE AS OF CHANGE:		20180409

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BOXLEY ABNEY S III
		CENTRAL INDEX KEY:			0001201852

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09929
		FILM NUMBER:		18745913

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX 13007
		CITY:			ROANOKE
		STATE:			VA
		ZIP:			24030

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INSTEEL INDUSTRIES INC
		CENTRAL INDEX KEY:			0000764401
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES & ROLLING & FINISHING MILLS [3310]
		IRS NUMBER:				560674867
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			0928

	BUSINESS ADDRESS:	
		STREET 1:		1373 BOGGS DR
		CITY:			MOUNT AIRY
		STATE:			NC
		ZIP:			27030
		BUSINESS PHONE:		9107862141

	MAIL ADDRESS:	
		STREET 1:		1373 BOGGS DRIVE
		CITY:			MOUNT AIRY
		STATE:			NC
		ZIP:			27030

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	EXPOSAIC INDUSTRIES INC
		DATE OF NAME CHANGE:	19880511
</SEC-HEADER>
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<DESCRIPTION>FORM 3
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<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2018-04-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000764401</issuerCik>
        <issuerName>INSTEEL INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>IIIN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001201852</rptOwnerCik>
            <rptOwnerName>BOXLEY ABNEY S III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1373 BOGGS DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MOUNT AIRY</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>27030</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>James F. Petelle for Abney S. Boxley III</signatureName>
        <signatureDate>2018-04-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa_boxley.htm
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center">POWER OF ATTORNEY</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; TEXT-INDENT: 36pt">I, Abney S. Boxley, III hereby grant Power of Attorney to the following individuals to sign forms on my behalf to be filed with the Securities and Exchange Commission pursuant to Section 16(a) of the Securities Exchange Act of 1934:&#160; James F. Petelle, Michael C. Gazmarian and Sheila M. Spencer.&#160; This Power of Attorney shall remain effective so long as I&#160;&#160; am required to file reports under Section 16(a) by virtue of my directorship with lnsteel Industries Inc.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">/s/ Abney S.&#160; Boxley, Ill</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left">Abney S.&#160; Boxley, Ill</div>
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