Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

Legacy entry preserved as a historical layer and reverse lookup target.

Official data

Feature	Description
Official name	North American Industry Classification System (NAICS) 2017
Maintained by	U.S. Census Bureau with North American statistical partners
Purpose	Historical business classification used before the 2022 NAICS revision
Primary use	Legacy filings, archived datasets, historical contract and census records
Status	Retired for current federal use; preserved here for reverse lookup and comparison

1 Use NAICS 2017 code 334513 when an older report, grant file, or contract still cites this legacy edition.

2 Use it when reconciling historical business data with current NAICS 2022 classifications.

3 Use it when a state or local registry still stores older NAICS values and you need the modern equivalent.

4 Use it to compare how an industry definition changed between the 2017 and 2022 revisions.