<SEC-DOCUMENT>0000080172-20-000004-index.html : 20200331
<SEC-HEADER>0000080172-20-000004.hdr.sgml : 20200331
<ACCEPTANCE-DATETIME>20200331161026
ACCESSION NUMBER:		0000080172-20-000004
CONFORMED SUBMISSION TYPE:	10-K/A
PUBLIC DOCUMENT COUNT:		4
CONFORMED PERIOD OF REPORT:	20191231
FILED AS OF DATE:		20200331
DATE AS OF CHANGE:		20200331

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATIONAL PRESTO INDUSTRIES INC
		CENTRAL INDEX KEY:			0000080172
		STANDARD INDUSTRIAL CLASSIFICATION:	ORDNANCE & ACCESSORIES, (NO VEHICLES/GUIDED MISSILES) [3480]
		IRS NUMBER:				390494170
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-K/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-02451
		FILM NUMBER:		20761889

	BUSINESS ADDRESS:	
		STREET 1:		3925 N HASTINGS WAY
		CITY:			EAU CLAIRE
		STATE:			WI
		ZIP:			54703
		BUSINESS PHONE:		7158392121

	MAIL ADDRESS:	
		STREET 1:		3925 N HASTINGS WAY
		CITY:			EAU CLAIRE
		STATE:			WI
		ZIP:			54703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NATIONAL PRESSURE COOKER CO
		DATE OF NAME CHANGE:	19710509
</SEC-HEADER>
<DOCUMENT>
<TYPE>10-K/A
<SEQUENCE>1
<FILENAME>npk-20191231x10ka.htm
<DESCRIPTION>10-K/A
<TEXT>
Document 1 - file: npk-20191231x10ka.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>npk-20191231xex23_1.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: npk-20191231xex23_1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>3
<FILENAME>npk-20191231xex31_1.htm
<DESCRIPTION>EX-31.1
<TEXT>
Document 3 - file: npk-20191231xex31_1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.2
<SEQUENCE>4
<FILENAME>npk-20191231xex31_2.htm
<DESCRIPTION>EX-31.2
<TEXT>
Document 4 - file: npk-20191231xex31_2.htm

</DOCUMENT>
</SEC-DOCUMENT>