Heat treating of metal for the trade

Facility	City	State	Employees	Status
OROak Ridge Industries, LLC	Washington	NC	20–99	◐ LIKELY ACTIVE
OMO&A Manufacturing	Brooklyn	WI	20–99	◐ LIKELY ACTIVE
OMOa Manufacturing INC	Verona	WI	20–99	◐ LIKELY ACTIVE
OOates	Sacramento	CA	20–99	◐ LIKELY ACTIVE
OLObcorp LLC	Saint Louis	MO	—	◐ LIKELY ACTIVE
OSOberg Sarver - Metal Stamping Facility	Sarver	PA	20–99	◐ LIKELY ACTIVE
OSO'Brien Steel Service- CHT	Peoria	IL	20–99	◐ LIKELY ACTIVE
OSO'Brien Steel Service- Congerville	Congerville	IL	20–99	◐ LIKELY ACTIVE
OSO'Brien Steel Service- Lacon	Lacon	IL	20–99	◐ LIKELY ACTIVE
OSO'Brien Steel Service-Minonk	Minonk	IL	20–99	◐ LIKELY ACTIVE
OIOCTA Inc	Buckner	KY	20–99	◐ LIKELY ACTIVE
OEM Fabricators Inc. - Neillsville	Neillsville	WI	20–99	◐ LIKELY ACTIVE
OEM Fabricators Inc. - Phillips	Phillips	WI	20–99	◐ LIKELY ACTIVE
OMOEM Manufacturing, LLC	Moraine	OH	20–99	◐ LIKELY ACTIVE
OTOEM Tube Assemblies - Chipley	Chipley	FL	20–99	◐ LIKELY ACTIVE
OTOEM Tube Assemblies - Clarksville	Clarksville	TN	100–499	◐ LIKELY ACTIVE
Oerlikon Balzers Coating USA Inc - Agawam	Agawam	MA	20–99	◐ LIKELY ACTIVE
Oerlikon Balzers Coating USA Inc - Amherst, NY	Amherst	NY	20–99	◐ LIKELY ACTIVE
Oerlikon Balzers Coating USA Inc - Elgin, IL	Elgin	IL	20–99	◐ LIKELY ACTIVE
Oerlikon Balzers Coating USA Inc - Lake Orion, MI	Lake Orion	MI	20–99	◐ LIKELY ACTIVE
Oerlikon Balzers Coating USA Inc - Rock Hill Tools, SC	Rock Hill	SC	20–99	◐ LIKELY ACTIVE
Oerlikon Balzers Coating USA Inc - Schaumburg, IL (Corp)	Schaumburg	IL	20–99	◐ LIKELY ACTIVE
OBOetiker Batavia	Batavia	NY	20–99	◐ LIKELY ACTIVE
OAOffice and Warehouse Division	Warren	MI	20–99	◐ LIKELY ACTIVE
OMOffSite Manufacturing	Chesterfield Twp	MI	20–99	◐ LIKELY ACTIVE
OIOgs Industries, INC	Akron	OH	—	▲ REPORTED CLOSED
OOhio	North Jackson	OH	1–19	◐ LIKELY ACTIVE
OFOhio Fabricators Company, Inc.	Coshocton	OH	20–99	◐ LIKELY ACTIVE
OHOhio Hickory Harvest Brand Product Inc.	Akron	OH	100–499	◐ LIKELY ACTIVE
OSOhio-Kentucky Steel, LLC	Toledo	OH	20–99	◐ LIKELY ACTIVE
OCOJV Construction	Elk Grove	CA	100–499	◐ LIKELY ACTIVE
OAO&k American - Chicago Plant	Chicago	IL	20–99	◐ LIKELY ACTIVE
OAO&k American - Seymour Plant	Seymour	IN	20–99	◐ LIKELY ACTIVE
OHOkeanus Houma	Houma	LA	20–99	◐ LIKELY ACTIVE
ODOld Dominion Welding LLC	Franklin	VA	—	▲ REPORTED CLOSED
OTOld Trail Road Facility	Abingdon	VA	20–99	◐ LIKELY ACTIVE
OTOlean Trl	Summerville	PA	20–99	◐ LIKELY ACTIVE
OHOle Hickory Pits - Nash Road	Scott City	MO	20–99	◐ LIKELY ACTIVE
OEOlgin Efune Recycling Company	Phoenix	AZ	20–99	◐ LIKELY ACTIVE
OSOlmar Supply PMD	Livermore	CA	1–19	◐ LIKELY ACTIVE
OCOlmstead Capital, INC.	Cadillac	MI	—	◐ LIKELY ACTIVE
OFOlson Fabrication, Inc.	Algoma	WI	20–99	◐ LIKELY ACTIVE
OTOlson Tool & Plastics, Inc.	Chaska	MN	20–99	◐ LIKELY ACTIVE
OCOlympia Chimney and Venting	Pittston	PA	100–499	◐ LIKELY ACTIVE
OTOlympian Tool LLC	Saint Johns	MI	20–99	◐ LIKELY ACTIVE
OWOlympic Water Jet LLC	Poulsbo	WA	—	◐ LIKELY ACTIVE
OCOMAMP Contech Engineered Solutions LLC	Wahoo	NE	1–19	◐ LIKELY ACTIVE
OCOMAX Corporation	Kent	WA	100–499	◐ LIKELY ACTIVE
OSOMCO Solar	Madison	AL	20–99	◐ LIKELY ACTIVE
OBOMG Building Products LLC	Agawam	MA	500+	◐ LIKELY ACTIVE
OCOMi Crane Systems INC/Hoist Parts INC	Royse City	TX	100–499	◐ LIKELY ACTIVE
OMOmni Manufacturing INC.	St.Marys	OH	20–99	◐ LIKELY ACTIVE
OOmnimax	Duluth	GA	20–99	◐ LIKELY ACTIVE
OSOmniroot Spc	Seattle	WA	—	◐ LIKELY ACTIVE
OIOMS Indianapolis	Indianapolis	IN	20–99	◐ LIKELY ACTIVE
OOMS-Kingsport	Kingsport	TN	1–19	◐ LIKELY ACTIVE
OMO'Neal Manufacturing Services	Fayette	AL	20–99	◐ LIKELY ACTIVE
OMO'Neal Manufacturing Services	Burlington	KY	20–99	◐ LIKELY ACTIVE
OSOne Source Manufacturing Headquarters	Leander	TX	100–499	◐ LIKELY ACTIVE
OMOntario Mechanical LLC	Mansfield	OH	20–99	◐ LIKELY ACTIVE
OPO P a Industries, LLC	Woods Cross	UT	—	◐ LIKELY ACTIVE
ODOperation Dawsonville GA	Dawsonville	GA	100–499	◐ LIKELY ACTIVE
ODOperations Detroit Lakes MN	Detroit Lakes	MN	100–499	◐ LIKELY ACTIVE
OLOperations Lakeville MN	Lakeville	MN	100–499	◐ LIKELY ACTIVE
OWOperations Washington IL	Washington	IL	100–499	◐ LIKELY ACTIVE
OSOptek Systems, INC.	Greenville	SC	—	◐ LIKELY ACTIVE
OOptiforms	Temecula	CA	20–99	◐ LIKELY ACTIVE
OOOptimas OE Solutions Holdings, LLC	Wood Dale	IL	100–499	◐ LIKELY ACTIVE
OIOptofab Incorporated	Santa Ana	CA	—	◐ LIKELY ACTIVE
OMOquist Machine Works LLC	Duvall	WA	—	◐ LIKELY ACTIVE
Orafol Americas OPTS	Rochester	NY	20–99	◐ LIKELY ACTIVE
OMOrbis Mes	Piedmont	SC	100–499	◐ LIKELY ACTIVE
OSOrick Stamping	Elida	OH	20–99	◐ LIKELY ACTIVE
OMOrion Manufacturing INC	Ionia	MI	20–99	◐ LIKELY ACTIVE
OMOrison Manufacturing Company	Greenbrier	TN	—	◐ LIKELY ACTIVE
OOOrizon Olathe	Olathe	KS	100–499	◐ LIKELY ACTIVE
OOsceola	Osceola	IA	100–499	◐ LIKELY ACTIVE
OOsceola	Osceola	WI	100–499	◐ LIKELY ACTIVE
OTOsceola Telling	Osceola	AR	20–99	◐ LIKELY ACTIVE
OUOSG USA, Inc., Cold Forming Division	Parma	OH	20–99	◐ LIKELY ACTIVE
OTOshea Tool & Machine CO. LLC	Cocolalla	ID	—	◐ LIKELY ACTIVE
OMOshkosh Marine Supply Company	Oshkosh	WI	—	◐ LIKELY ACTIVE
OKO.S. Kelly Company	Springfield	OH	20–99	◐ LIKELY ACTIVE
OSOsp Sling, INC.	Sequim	WA	—	◐ LIKELY ACTIVE
Otis Products Inc. Lyons Falls	Lyons Falls	NY	20–99	◐ LIKELY ACTIVE
OJOtto J Nellesen Jr	Valley Center	CA	—	◐ LIKELY ACTIVE
OROuter Rim Tech LLC	Plain City	UT	—	◐ LIKELY ACTIVE
OIOwen Industries INC	Sioux City	IA	—	◐ LIKELY ACTIVE
OCOwens Corning	Duncan	SC	20–99	◐ LIKELY ACTIVE
OSOzark Steel LLC	Tulsa	OK	20–99	◐ LIKELY ACTIVE
OSOzark Steel LLC North	Tulsa	OK	20–99	◐ LIKELY ACTIVE
PMP5 Machine, LLC	Antlers	OK	—	◐ LIKELY ACTIVE
PPa04-lhv-whitehall	Whitehall	PA	20–99	◐ LIKELY ACTIVE
PMPace Machine & Tool, INC.	Stuart	FL	—	▲ REPORTED CLOSED
PCPacific Coast Pattern LLC	Davenport	IA	—	◐ LIKELY ACTIVE
PCPacific Corrugated Pipe Company LLC Sacramento	Sacramento	CA	20–99	◐ LIKELY ACTIVE
PMPacific Maritime Industries CORP.	San Diego	CA	—	◐ LIKELY ACTIVE
PPPacific Precision Machine INC	Sonora	CA	—	▲ REPORTED CLOSED
PSPacific Steel Group, LLC	San Diego	CA	—	◐ LIKELY ACTIVE
PIPackless Industries	Waco	TX	100–499	◐ LIKELY ACTIVE

FactoryRegistry lists 36,644 facilities whose primary industry classification is one of the 20 industries above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced Heat treating of metal for the trade (heat treating, annealing, brazing, shot peening, tempering, etc.), in the shares shown above, and does not say which establishments. Where a plant’s own website or a federal registry names what that plant makes, it appears on the plant’s own page with the source named.

The U.S. Census Bureau recorded this product line in 20 US manufacturing industries in the 2022 Economic Census, as the most specific line those industries reported. At least 2,719 establishments reported producing it; the count for 7 of those industries was withheld.

These are counts of establishments by industry: the Economic Census publishes them as industry totals and never as a list of plants.

NAPCS collection code 2053450000. Source for the product line, the establishment counts and the shares: U.S. Census Bureau, 2022 Economic Census (ECNNAPCSIND2022). Federal source data is public domain. Facility records are compiled separately by FactoryRegistry and carry their own sources.