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<?xml version="1.0" encoding="windows-1252"?> |
<ownershipDocument> |
| <schemaVersion> X0306 </schemaVersion> |
| <documentType> 4 </documentType> |
| <periodOfReport> 2019-12-20 </periodOfReport> |
| <notSubjectToSection16> 0 </notSubjectToSection16> |
| <issuer> |
| | <issuerCik> 0000031107 </issuerCik> |
| | <issuerName> EASTERN CO </issuerName> |
| | <issuerTradingSymbol> EML </issuerTradingSymbol> |
| | </issuer> |
| <reportingOwner> |
| | <reportingOwnerId> |
| | | <rptOwnerCik> 0001254583 </rptOwnerCik> |
| | | <rptOwnerName> MITAROTONDA JAMES A </rptOwnerName> |
| | | </reportingOwnerId> |
| | <reportingOwnerAddress> |
| | | <rptOwnerStreet1> C/O BARINGTON CAPITAL GROUP L.P. </rptOwnerStreet1> |
| | | <rptOwnerStreet2> 888 SEVENTH AVENUE 17TH FLOOR </rptOwnerStreet2> |
| | | <rptOwnerCity> NEW YORK </rptOwnerCity> |
| | | <rptOwnerState> NY </rptOwnerState> |
| | | <rptOwnerZipCode> 10019 </rptOwnerZipCode> |
| | | <rptOwnerStateDescription></rptOwnerStateDescription> |
| | | </reportingOwnerAddress> |
| | <reportingOwnerRelationship> |
| | | <isDirector> 1 </isDirector> |
| | | <isOfficer> 0 </isOfficer> |
| | | <isTenPercentOwner> 0 </isTenPercentOwner> |
| | | <isOther> 0 </isOther> |
| | | <officerTitle></officerTitle> |
| | | <otherText></otherText> |
| | | </reportingOwnerRelationship> |
| | </reportingOwner> |
| <nonDerivativeTable> |
| | <nonDerivativeTransaction> |
| | | <securityTitle> |
| <value> Common Shares </value> |
| <footnoteId id="F1"/> |
| </securityTitle> |
| | | <transactionDate> |
| <value> 2019-12-20 </value> |
| </transactionDate> |
| | | <deemedExecutionDate></deemedExecutionDate> |
| | | <transactionCoding> |
| <transactionFormType> 4 </transactionFormType> |
| <transactionCode> A </transactionCode> |
| <equitySwapInvolved> 0 </equitySwapInvolved> |
| </transactionCoding> |
| | | <transactionAmounts> |
| <transactionShares> |
| <value> 579 </value> |
| </transactionShares> |
| <transactionPricePerShare> |
| <value> 29.79 </value> |
| </transactionPricePerShare> |
| <transactionAcquiredDisposedCode> |
| <value> A </value> |
| </transactionAcquiredDisposedCode> |
| </transactionAmounts> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 9363 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> D </value> |
| </directOrIndirectOwnership> |
| </ownershipNature> |
| | | </nonDerivativeTransaction> |
| | <nonDerivativeHolding> |
| | | <securityTitle> |
| <value> Common Shares </value> |
| </securityTitle> |
| | | <postTransactionAmounts> |
| <sharesOwnedFollowingTransaction> |
| <value> 575703 </value> |
| </sharesOwnedFollowingTransaction> |
| </postTransactionAmounts> |
| | | <ownershipNature> |
| <directOrIndirectOwnership> |
| <value> I </value> |
| </directOrIndirectOwnership> |
| <natureOfOwnership> |
| <value> By Barington Company Equity Partners, L.P. </value> |
| <footnoteId id="F2"/> |
| <footnoteId id="F3"/> |
| </natureOfOwnership> |
| </ownershipNature> |
| | | </nonDerivativeHolding> |
| | </nonDerivativeTable> |
| <derivativeTable></derivativeTable> |
| <footnotes> |
| | <footnote id="F1"> 579 shares acquired under The Eastern Company Director's Fee Program pursuant to Rule 16b-3(d). The price used to determine the number of shares is the price of the shares on December 13, 2019. </footnote> |
| | <footnote id="F2"> The Reporting Person is the sole stockholder and director of LNA Capital Corp. LNA Capital Corp. is the general partner of Barington Capital Group, L.P., which is the majority member of Barington Companies Investors, LLC ("Barington Investors"). Barington Investors is the general partner of Barington Companies Equity Partners, L.P. </footnote> |
| | <footnote id="F3"> The Reporting Person disclaims beneficial ownership of these securities, except to the extent of his pecuniary interest therein, and this report shall not be deemed to be an admission that the Reporting Person is the beneficial owner of these shares for purposes of Section 16 or for any other purpose. </footnote> |
| | </footnotes> |
| <ownerSignature> |
| | <signatureName> /s/James A. Mitarotonda </signatureName> |
| | <signatureDate> 2019-12-23 </signatureDate> |
| | </ownerSignature> |
| </ownershipDocument> |