NAICS Code 333994: Industrial Process Furnace and Oven Manufacturing
National industry
SBA small business size standard: 500 employees
Definition
This U.S. industry comprises establishments primarily engaged in manufacturing industrial process ovens, induction and dielectric heating equipment, and kilns (except cement, chemical, wood). Included in this industry are establishments manufacturing laboratory furnaces and ovens.
Government contracts for this product: PSC 4440 Driers, Dehydrators, and Anhydrators
Code facts
- Part of
-
-
31-33
-
333
-
3339
- 33399
-
3339
-
333
-
31-33
- Contract awards
- 124 In the last 12 months
- Contract obligations
- $25,322,054 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 333994
- Ceramic kilns and furnaces manufacturing
- Core baking and mold drying ovens manufacturing
- Dielectric industrial heating equipment manufacturing
- Distillation ovens, charcoal and coke, manufacturing
- Enameling ovens manufacturing
- Furnaces and ovens for drying and redrying, industrial process-type, manufacturing
- Furnaces and ovens, semiconductor wafer, manufacturing
- Furnaces, industrial and laboratory-type (except dental), manufacturing
- Garbage incinerators (except precast concrete) manufacturing
- Heat treating ovens, industrial process-type, manufacturing
- Incinerators (except precast concrete) manufacturing
- Induction heating equipment, industrial process-type, manufacturing
- Infrared ovens, industrial, manufacturing
- Japanning ovens manufacturing
- Kilns (except cement, chemical, wood) manufacturing
- Lacquering ovens manufacturing
- Metal melting furnaces, industrial, manufacturing
- Ovens, industrial process and laboratory-type, manufacturing
- Paint baking and drying ovens manufacturing
- Smelting ovens manufacturing
- Tilemaking kilns manufacturing
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $1,182 |
| FY2026 | $12,102,194 |
| FY2025 | $25,322,054 |
| FY2024 | $31,263,183 |
| FY2023 | $25,488,312 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Howell Laboratories Inc. | $942,760 | |
| 2 | Bighorn Solutions LLC | $833,653 | |
| 3 | Ajax Tocco Magnethermic Corp | $713,924 | |
| 4 | Heattek Inc. | $697,981 | |
| 5 | Northern Defense Industries, LLC | $669,046 | |
| 6 | Armil / Cfs, Inc. | $575,900 | |
| 7 | Consolidated Engineering Company, Inc. | $542,625 | |
| 8 | Norcatec LLC | $520,279 | |
| 9 | TPS LLC | $440,812 | |
| 10 | Linmarr Associates, Inc. | $371,344 |
See the full FY2025 ranking of NAICS 333994 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Defense Logistics Agency | $6,054,440 | |
| 2 | Department of the Army | $2,192,978 | |
| 3 | Department of the Navy | $1,168,133 | |
| 4 | Department of the Treasury | $822,871 | |
| 5 | Department of Energy | $630,955 | |
| 6 | Air Force | $558,860 | |
| 7 | National Aeronautics and Space Administration | $228,452 | |
| 8 | Department of Justice | $146,301 | |
| 9 | Department of Homeland Security | $146,135 | |
| 10 | Department of Agriculture | $101,230 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 4440 Driers, Dehydrators, and Anhydrators | $4,233,108 | |
| 2 | 4430 Industrial Furnaces, Kilns, Lehrs, and Ovens | $2,183,543 | |
| 3 | 3424 Metal Heat Treating and Non-Thermal Treating Equipment | $1,793,093 | |
| 4 | 3680 Foundry Machinery, Related Equipment and Supplies | $713,924 | |
| 5 | J044 Maintenance, Repair and Rebuilding of Equipment: Furnace, Steam Plant, and Drying Equipment; and Nuclear Reactors | $700,215 | |
| 6 | 7320 Kitchen Equipment and Appliances | $583,141 | |
| 7 | 4620 Water Distillation Equipment, Marine and Industrial | $520,279 | |
| 8 | 4520 Space and Water Heating Equipment | $348,857 | |
| 9 | 6640 Laboratory Equipment and Supplies | $270,071 | |
| 10 | 6695 Combination and Miscellaneous Instruments | $176,744 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Illinois | $1,289,824 | |
| 2 | Virginia | $946,005 | |
| 3 | Maine | $942,760 | |
| 4 | New York | $867,632 | |
| 5 | Nevada | $833,653 | |
| 6 | Pennsylvania | $752,439 | |
| 7 | Oklahoma | $742,642 | |
| 8 | Ohio | $649,001 | |
| 9 | Washington | $630,318 | |
| 10 | Georgia | $512,833 | |
| 11 | Maryland | $462,533 | |
| 12 | Alabama | $357,412 | |
| 13 | Idaho | $347,325 | |
| 14 | Florida | $343,678 | |
| 15 | California | $323,665 | |
| 16 | South Carolina | $260,633 | |
| 17 | Utah | $248,362 | |
| 18 | North Carolina | $165,163 | |
| 19 | Oregon | $163,914 | |
| 20 | Delaware | $102,000 | |
| 21 | New Jersey | $73,965 | |
| 22 | Arizona | $73,948 | |
| 23 | West Virginia | $53,973 | |
| 24 | New Hampshire | $52,056 | |
| 25 | Louisiana | $34,669 | |
| 26 | Colorado | $22,989 | |
| 27 | Texas | $21,478 | |
| 28 | Kentucky | $21,400 | |
| 29 | Nebraska | $15,224 | |
| 30 | Arkansas | $9,051 | |
| 31 | Connecticut | $8,333 | |
| 32 | Massachusetts | $4,584 | |
| 33 | Indiana | $3,880 | |
| 34 | Mississippi | $80 |
Show all 34
Shares are of everything obligated under NAICS 333994 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 1,825 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 333994?
NAICS 333994 is Industrial Process Furnace and Oven Manufacturing, a national industry in NAICS 31-33, Manufacturing.
What is the NAICS code for smelting ovens manufacturing?
The NAICS code for smelting ovens manufacturing is 333994, Industrial Process Furnace and Oven Manufacturing.
What is the NAICS code for enameling ovens manufacturing?
The NAICS code for enameling ovens manufacturing is 333994, Industrial Process Furnace and Oven Manufacturing.
What is the NAICS code for japanning ovens manufacturing?
The NAICS code for japanning ovens manufacturing is 333994, Industrial Process Furnace and Oven Manufacturing.
When did the size standard for NAICS 333994 last change?
The most recent Federal Register rule on record that names NAICS 333994 in the SBA's size standards is "Small Business Size Standards; Adoption of Size Standards by 2002 North American Industry Classification System for Size Standards" (67 FR 56905), published Sep 6, 2002 and effective Oct 1, 2002.
How much do federal agencies spend under NAICS 333994?
Federal contracts under NAICS 333994 obligated $25,322,054 in fiscal year 2025 and $94,176,925 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 333994?
The contractors with the most obligated under NAICS 333994 in fiscal years 2026 and 2027 are Howell Laboratories Inc. ($942,760), Bighorn Solutions LLC ($833,653) and Ajax Tocco Magnethermic Corp ($713,924).
Which agencies buy the most under NAICS 333994?
The agencies that obligated the most under NAICS 333994 in fiscal years 2026 and 2027 are Defense Logistics Agency ($6,054,440), Department of the Army ($2,192,978) and Department of the Navy ($1,168,133).
Which PSC codes are used with NAICS 333994?
The PSC codes with the most obligated under NAICS 333994 in fiscal years 2026 and 2027 are 4440 Driers, Dehydrators, and Anhydrators; 4430 Industrial Furnaces, Kilns, Lehrs, and Ovens; and 3424 Metal Heat Treating and Non-Thermal Treating Equipment.
Where is the work under NAICS 333994 performed?
By place of performance, the states with the most contract obligations under NAICS 333994 over the last 12 months are Illinois ($1,289,824), Virginia ($946,005) and Maine ($942,760).
What is the latest contract opportunity under NAICS 333994?
The latest contract opportunity under NAICS 333994 is Oven, thermal drying, electric, award notice from Construction and Equipment (DLA), posted November 12, 2026.
On GovTribe
See everything under NAICS 333994
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