<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0000317835</cik>
        <entityName>TNEMEC CO INC</entityName>
        <issuerAddress>
            <street1>123 W 23rd Avenue</street1>
            <city>North Kansas City</city>
            <stateOrCountry>MO</stateOrCountry>
            <stateOrCountryDescription>MISSOURI</stateOrCountryDescription>
            <zipCode>64116</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>816-483-3400</issuerPhoneNumber>
        <jurisdictionOfInc>MISSOURI</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Albert</firstName>
                <middleName>C</middleName>
                <lastName>Bean, IV</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 W 23rd Avenue</street1>
                <city>North Kansas City</city>
                <stateOrCountry>MO</stateOrCountry>
                <stateOrCountryDescription>MISSOURI</stateOrCountryDescription>
                <zipCode>64116</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kenneth</firstName>
                <middleName>D</middleName>
                <lastName>Lloyd</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 W 23rd Avenue</street1>
                <city>North Kansas City</city>
                <stateOrCountry>MO</stateOrCountry>
                <stateOrCountryDescription>MISSOURI</stateOrCountryDescription>
                <zipCode>64116</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>S</middleName>
                <lastName>Berkley</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>819 E 19th Street</street1>
                <city>Kansas City</city>
                <stateOrCountry>MO</stateOrCountry>
                <stateOrCountryDescription>MISSOURI</stateOrCountryDescription>
                <zipCode>64108</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>G</middleName>
                <lastName>Burcham</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>5011 Sunset Drive</street1>
                <city>Kansas City</city>
                <stateOrCountry>MO</stateOrCountry>
                <stateOrCountryDescription>MISSOURI</stateOrCountryDescription>
                <zipCode>64112</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kimbrough</firstName>
                <middleName>B</middleName>
                <lastName>Higgins</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6720 Overhill Road</street1>
                <city>Mission Hills</city>
                <stateOrCountry>KS</stateOrCountry>
                <stateOrCountryDescription>KANSAS</stateOrCountryDescription>
                <zipCode>66208</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>H</middleName>
                <lastName>Parkerson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10955 Lowell Avenue</street1>
                <city>Overland Park</city>
                <stateOrCountry>KS</stateOrCountry>
                <stateOrCountryDescription>KANSAS</stateOrCountryDescription>
                <zipCode>66210</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName>R</middleName>
                <lastName>Willard</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1000 Walnut</street1>
                <street2>Suite 900</street2>
                <city>Kansas City</city>
                <stateOrCountry>MO</stateOrCountry>
                <stateOrCountryDescription>MISSOURI</stateOrCountryDescription>
                <zipCode>64106</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Cory</firstName>
                <middleName>M</middleName>
                <lastName>Brown</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>123 W 23rd Avenue</street1>
                <city>North Kansas City</city>
                <stateOrCountry>MO</stateOrCountry>
                <stateOrCountryDescription>MISSOURI</stateOrCountryDescription>
                <zipCode>64116</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Manufacturing</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2026-06-10</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>325</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>3001152</totalOfferingAmount>
            <totalAmountSold>941920</totalAmountSold>
            <totalRemaining>2059232</totalRemaining>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>true</hasNonAccreditedInvestors>
            <numberNonAccreditedInvestors>6</numberNonAccreditedInvestors>
            <totalNumberAlreadyInvested>29</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>TNEMEC CO INC</issuerName>
                <signatureName>/s/ Kenneth D. Lloyd</signatureName>
                <nameOfSigner>Kenneth D. Lloyd</nameOfSigner>
                <signatureTitle>Chief Financial Officer</signatureTitle>
                <signatureDate>2026-06-17</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
