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<ACCEPTANCE-DATETIME>20220210172243
ACCESSION NUMBER:		0000815556-22-000011
CONFORMED SUBMISSION TYPE:	10-K/A
PUBLIC DOCUMENT COUNT:		29
CONFORMED PERIOD OF REPORT:	20211231
FILED AS OF DATE:		20220210
DATE AS OF CHANGE:		20220210

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FASTENAL CO
		CENTRAL INDEX KEY:			0000815556
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-BUILDING MATERIALS, HARDWARE, GARDEN SUPPLY [5200]
		IRS NUMBER:				410948415
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-16125
		FILM NUMBER:		22615386

	BUSINESS ADDRESS:	
		STREET 1:		2001 THEURER BLVD
		CITY:			WINONA
		STATE:			MN
		ZIP:			55987
		BUSINESS PHONE:		5074545374

	MAIL ADDRESS:	
		STREET 1:		2001 THEURER BLVD
		CITY:			WINONA
		STATE:			MN
		ZIP:			55987
</SEC-HEADER>
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<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>fast-20211231.htm
<DESCRIPTION>10-K/A
<TEXT>
Document 1 - file: fast-20211231.htm

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<DOCUMENT>
<TYPE>EX-10.4
<SEQUENCE>2
<FILENAME>fast1231202110-kaexhibit104.htm
<DESCRIPTION>FASTENAL COMPANY NON-EMPLOYEE DIRECTOR STOCK OPTION PLAN
<TEXT>
Document 2 - file: fast1231202110-kaexhibit104.htm

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<DOCUMENT>
<TYPE>EX-31.3
<SEQUENCE>3
<FILENAME>fast1231202110-kaexhibit313.htm
<DESCRIPTION>CERTIFICATION OF CEO UNDER SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
<TEXT>
Document 3 - file: fast1231202110-kaexhibit313.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.4
<SEQUENCE>4
<FILENAME>fast1231202110-kaexhibit314.htm
<DESCRIPTION>CERTIFICATION OF CFO UNDER SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
<TEXT>
Document 4 - file: fast1231202110-kaexhibit314.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>5
<FILENAME>glossywrap-printversion.htm
<DESCRIPTION>2021 ANNUAL REPORT TO SHAREHOLDERS
<TEXT>
Document 5 - file: glossywrap-printversion.htm

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