PSC H336: Inspection – Special Industry Machinery
H336 is the product and service code (PSC) federal agencies use for inspection – special industry machinery, in the inspection services group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 0
- Spending, FY2025
- $734,445
- Share to small businesses, since FY2024
- 67%
Open count as of Oct 11, 2026, 9:10 PM ET.
Where H336 sits in the PSC Manual
- Category: Service
- Group H: Quality Control, Test, Inspection
- Group H3: Inspection Services
- Code H336: Inspection – Special Industry Machinery
NAICS codes used with PSC H336
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with H336 most often:
| NAICS | Industry | Spent, last 3 years | Open notices |
|---|---|---|---|
| 811310 | Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance | $543,372 | — |
| 561790 | Other Services to Buildings and Dwellings | $297,410 | — |
| 541350 | Building Inspection Services | $274,875 | — |
| 238220 | Plumbing, Heating, and Air-Conditioning Contractors | $200,082 | — |
| 541370 | Surveying and Mapping (except Geophysical) Services | $124,234 | — |
| 541990 | All Other Professional, Scientific, and Technical Services | $96,723 | — |
Who buys under PSC H336
Agencies with the most contract dollars under H336 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of the Army | $795,844 |
| Department of the Navy | $392,724 |
| Public Buildings Service | $277,475 |
| Federal Aviation Administration | $96,723 |
| Federal Prison System / Bureau of Prisons | $62,066 |
| National Park Service | $59,356 |
| National Oceanic and Atmospheric Administration | $32,000 |
| Defense Logistics Agency | $22,640 |
Federal spending under PSC H336 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $675,229 |
| FY2025 | $734,445 |
| FY2026 (incomplete) | $358,589 |
Headline figures use FY2025, the last complete year. FY2026 is still incomplete and will rise until about early January 2027 as Defense data arrives: USAspending.gov publishes Defense contracts 90 days after they're signed.
Who wins PSC H336 contracts
| Company | Obligated, last 3 years |
|---|---|
| Northrop Grumman Systems CorporationPart of Northrop Grumman | $384,224 |
| Pearlson Shiplift Corporation | $295,791 |
| RD3, Inc. | $277,475 |
| Mascott Equipment Company, Inc. | $203,865 |
| Technical Loadarm, Inc. | $137,800 |
| Konecranes Inc | $124,234 |
| Tilley Crane Inspection Service Co., Inc. | $96,723 |
| Wenger Corp | $59,477 |
| Hexagon Manufacturing Intelligence, LLC | $43,200 |
| Art Anderson Associates Inc | $32,000 |
Linked names have a FedReady profile, which shows the NAICS codes a business is registered as small under. Most large companies have none.
Related PSC codes
- H310 Inspection – Weapons
- H311 Inspection – Nuclear Ordnance
- H312 Inspection – Fire Control Equipment
- H313 Inspection – Ammunition and Explosives
- H314 Inspection – Guided Missiles
- H315 Inspection – Aircraft and Airframe Structural Components
- H316 Inspection – Aircraft Components and Accessories
- H317 Inspection – Aircraft Launching, Landing, and Ground Handling Equipment
- H318 Inspection – Space Vehicles
- H319 Inspection – Ships, Small Craft, Pontoons, and Floating Docks
Frequently asked questions
What is PSC H336?
H336 is the service code in the federal Product and Service Code (PSC) Manual for inspection – special industry machinery, under H (Quality Control, Test, Inspection) and H3 (Inspection Services). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
Which NAICS code goes with PSC H336?
Most federal contract dollars under PSC H336 go with NAICS 811310 (Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance), according to USAspending.gov. The contracting officer picks the NAICS code for each solicitation, so check the notice.
How do I find contracts that use PSC H336?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. FedReady can match new ones to your business and email you, free.