PSC 6635: Physical Properties Testing and Inspection
6635 is the product and service code (PSC) federal agencies use for physical properties testing and inspection, in the instruments and laboratory eqpt 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
- 12
- Spending, FY2026
- $45 million
- Share to small businesses
- 58%
Open contracts with PSC 6635, due soonest
- Water Filled Test Weight
Due in 3 daysOct 13, 2026
- Force Plate
Due in 4 daysOct 13, 2026
- Handheld X-Ray Fluorescence for ERDC GSL
✦ The U.S. Army Engineer Research and Development Center (Geotechnical and Structures Lab) in Vicksburg, MS wants to buy one handheld X-ray fluorescence (XRF) analyzer, a field…
Due in 55 daysDec 3, 2026
- TECHNOLOGY LICENSING OPPORTUNITY: Multi-Channel Atomic Magnetometer (MCAM)
Due in 64 daysDec 13, 2026
- FCC Terre Haute DRINK WATER TESTING FY27
✦ The Federal Bureau of Prisons at the Federal Correctional Complex in Terre Haute, Indiana wants weekly drinking water testing.
Due in 347 daysSep 22, 2027
Where 6635 sits in the PSC Manual
- Category: Product
- Group 66: Instruments and Laboratory Eqpt
- Code 6635: Physical Properties Testing and Inspection
NAICS codes used with PSC 6635
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with 6635 most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 334517 | Irradiation Apparatus Manufacturing | $47.9 million |
| 334519 | Other Measuring and Controlling Device Manufacturing | $45.4 million |
| 334516 | Analytical Laboratory Instrument Manufacturing | $40.4 million |
| 334513 | Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables | $11.5 million |
| 519210 | Libraries and Archives | $10.3 million |
| 334118 | Computer Terminal and Other Computer Peripheral Equipment Manufacturing | $6.9 million |
| 332439 | Other Metal Container Manufacturing | On 1 open |
| 541380 | Testing Laboratories and Services | On 1 open |
Who buys under PSC 6635
Agencies with the most contract dollars under 6635 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of the Navy | $56.2 million |
| Department of the Air Force | $41.7 million |
| Defense Logistics Agency | $34.1 million |
| Department of the Army | $25.8 million |
| U.S. Customs and Border Protection | $18.3 million |
| U.S. Secret Service | $4.8 million |
| Department of State | $2.3 million |
| National Aeronautics and Space Administration | $1.8 million |
On open notices right now, the most 6635 work comes from Dept of Defense, Department of Energy and Department of Justice.
Federal spending under PSC 6635 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $79 million |
| FY2025 | $70.4 million |
| FY2026 | $45 million |
| FY2027 (so far) | $0 |
Who wins PSC 6635 contracts
| Company | Obligated, last 3 years |
|---|---|
| NDT Solutions, LLC | $16.7 million |
| D-2 Incorporated | $12.9 million |
| Hadland Imaging LLC | $11.2 million |
| Rapiscan Systems Inc | $8.3 million |
| V.J. Technologies, Inc | $7.8 million |
| North Star Imaging Incorporated | $7.6 million |
| Fisica Applied Technologies, Inc. | $7.4 million |
| Jess W. Jackson and Associates, Inc. | $6.3 million |
| Northrop Grumman Systems Corp | $4.5 million |
| Expotech U.S.a., Inc. | $4.2 million |
Related PSC codes
- 6605 Navigational Instruments
- 6610 Flight Instruments
- 6615 Automatic Pilot Mechanisms and Airborne Gyro Components
- 6620 Engine Instruments
- 6625 Electrical and Electronic Properties Measuring and Testing Instruments
- 6630 Chemical Analysis Instruments
- 6632 Analysis Instruments, Medical Laboratory Use
- 6636 Environmental Chambers and Related Equipment
- 6640 Laboratory Equipment and Supplies
- 6645 Time Measuring Instruments
Frequently asked questions
What is PSC 6635?
6635 is the product code in the federal Product and Service Code (PSC) Manual for physical properties testing and inspection, under 66 (Instruments and Laboratory Eqpt). 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 6635?
Most federal contract dollars under PSC 6635 go with NAICS 334517 (Irradiation Apparatus Manufacturing), 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 6635?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 12 open notices use PSC 6635 right now. FedReady can match new ones to your business and email you, free.