National Defense R&d Services; Atomic Energy Defense Activities; Basic Research

PSC code AC21 — National Defense R&d Services; Atomic Energy Defense Activities; Basic Research — is used by federal contracting officers to classify service purchases. When an agency awards a contract for national defense r&d services; atomic energy defense activities; basic research, they record PSC code AC21 in the Federal Procurement Data System (FPDS).

As a vendor, knowing this PSC code helps you find relevant opportunities. Search for active solicitations using PSC code AC21 on SAM.gov, or review historical awards on USASpending.gov to understand which agencies buy this service and at what contract values.

PSC code AC21 falls under the C – National Defense R&d Services category. Service codes like this one are used for professional services, IT, construction, and R&D contracts.

To find opportunities using this PSC code on SAM.gov:

You can also track historical spending patterns for PSC code AC21 on USASpending.gov. Filter by agency, fiscal year, and award type to identify your best customers and forecast future opportunities.

What is PSC code AC21?

PSC code AC21 — NATIONAL DEFENSE R&D SERVICES; ATOMIC ENERGY DEFENSE ACTIVITIES; BASIC RESEARCH — is a federal Product and Service Code used to classify service purchases on government contracts. It falls under the Research and Development category and is used by contracting officers when reporting contract actions in the Federal Procurement Data System (FPDS).

How do I use PSC code AC21 in SAM.gov?

PSC codes are used by the government to describe what they are buying, not by vendors to register. However, understanding PSC code AC21 helps you identify which federal opportunities to pursue. Search for active opportunities using this PSC code on SAM.gov under Contract Opportunities, or use USASpending.gov to see historical contract awards under this code.

What types of contracts use PSC code AC21?

Federal agencies use PSC code AC21 (NATIONAL DEFENSE R&D SERVICES; ATOMIC ENERGY DEFENSE ACTIVITIES; BASIC RESEARCH) when awarding contracts for national defense r&d services; atomic energy defense activities; basic research. You can view all current and historical contract awards under this code on USASpending.gov.