PSC 4931
Overview
The Product Service Code (PSC) is a governmentwide taxonomy used to classify the products and services procured by the U.S. government, enabling consistent reporting, analysis, and management of spend across acquisition systems such as FPDS and SAM. The PSC structure and definitions are maintained in the PSC Manual published by GSA. 1
PSC 4931 denotes Fire Control Maintenance and Repair Shop Specialized Equipment. Per the PSC Manual, it covers shop-level equipment specially designed for maintaining and repairing fire control systems, including dedicated test equipment, maintenance fixtures, and stands; it excludes instruments usable on both fire control and other equipment, and excludes airborne fire control M&R shop equipment. 1
See also on G2X:
What this PSC covers
- Specially designed test equipment for the maintenance and repair of fire control systems. 1
- Maintenance fixtures engineered specifically for fire control servicing tasks. 1
- Maintenance stands intended for shop use with fire control components. 1
- Ground (non-airborne) fire control maintenance and repair shop specialized equipment. 1
- Items classified here only when their design is specific to fire control maintenance and repair. 1
- Equipment not intended for dual use with non–fire control systems. 1
Related NAICS and PSC codes
| Type | Code | Descriptor |
|---|---|---|
| PSC | 4910 | Motor Vehicle Maintenance and Repair Shop Specialized Equipment |
| PSC | 4920 | Aircraft Maintenance and Repair Shop Specialized Equipment |
| PSC | 4933 | Weapons Maintenance and Repair Shop Specialized Equipment |
| PSC | 4935 | Guided Missile Maintenance, Repair, and Checkout Specialized Equipment |
Source: PSC Manual. 1
Scope notes and boundaries
- Includes: “Specially Designed Test Equipment, Maintenance Fixtures and Stands” for fire control systems. 1
- Excludes: Instruments designed for use on both fire control and other equipment (dual‑use instruments are not coded under 4931). 1
- Excludes: Airborne fire control maintenance and repair shop equipment (that work is not within 4931). 1
- Group 49 note: Infrared assemblies/components that are test and maintenance specialized equipment are classified within Group 49, not in communications/night‑vision testing classes. 1
- Coding principle: When buys include multiple items, select the PSC for the predominant product or service on the action. 1
Frequently asked questions
-
What exactly is PSC 4931?
PSC 4931 is defined as Fire Control Maintenance and Repair Shop Specialized Equipment. It includes specially designed fire control test equipment, maintenance fixtures, and stands intended for shop use. It excludes dual‑use instruments that work on non‑fire‑control systems and excludes airborne fire control M&R shop equipment. 1 -
How does PSC 4931 differ from PSC 4933 and PSC 4920?
PSC 4931 is specific to fire control shop equipment. PSC 4933 covers weapons M&R shop equipment (e.g., stands, fixtures, jigs). PSC 4920 covers aircraft M&R shop specialized equipment, including fire control only when it pertains to aircraft systems. 1 -
Where are PSC codes used in federal systems?
PSC codes are recorded in the Federal Procurement Data System (FPDS) to describe the product or service on each reported contract action. They support standardized spend reporting, governmentwide analytics, and categorization across acquisition systems, including SAM.gov and agency reporting environments. 1 -
Can SAM.gov searches use PSC filters?
Yes. SAM.gov’s Contract Opportunities interface provides filters by PSC to refine market research and opportunity discovery. Users can apply PSC filters alone or alongside NAICS and keywords to target relevant solicitations and notices. See SAM.gov Help resources for instructions and videos. 3 -
Which agencies most frequently buy under PSC 4931?
Not specified by official sources 2. In practice, buyers may include defense and federal entities that maintain fire control systems, but agency‑level spend distribution for this specific PSC is not published in the PSC Manual. Market researchers should analyze historical data in public procurement systems.
Useful resources
- G2X — PSC 4931
- PSC Manual (April 2025 edition, PDF). 1
- PSC Manual landing page and document library. 2
- SAM.gov help: Videos and guides for searching opportunities by PSC. 3
References
- Product and Service Codes (PSC) Manual, April 2025 (PDF), Acquisition.gov: https://origin-www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf
- Product and Service Code (PSC) Manual — Landing page and library, Acquisition.gov: https://www.acquisition.gov/psc-manual
- SAM.gov Help — Contract Opportunities search resources: https://sam.gov/help
Active Federal Contract Opportunities for PSC 4931
Browse recently posted federal contract opportunities for PSC 4931 — FIRE CONTROL MAINTENANCE AND REPAIR SHOP SPECIALIZED EQUIPMENT.
Last updated Nov 24, 2025. For real-time data, visit the G2X GovCon Growth Platform.
Recent Federal Contract Opportunities
Most recent federal contracting opportunities for PSC 4931
| Title | Agency | Deadline |
|---|---|---|
| Alon Sensor Windows | Department of the Navy | Past deadline about 2 months ago |
| Alon Sensor Windows | Department of the Navy | Past deadline 3 months ago |
| Sources Sought Notice, Market Research, Simulator, Valve, NSN: 4931-01-495-9541 | Department of the Army | Past deadline 4 months ago |
| CA-SAN LUIS NWR-FIRE EXTINGUISHER SERVICE | U.S. Fish and Wildlife Service | Past deadline 7 months ago |
| Fire System and Suppression Maintenance and Repair Services | National Institutes of Health | Past deadline 7 months ago |
| Synopsis: Fixture, Test, Fire, Control Instrument NSN: 4931-00-769-1596 | Department of the Army | Past deadline 9 months ago |
| UNRESTRICTED; Test Set, Fire Contr; NSN 4931-01-388-4079, PN 408364, PR 7008405618 | Defense Logistics Agency | Past deadline 9 months ago |
| Test Set, Fire Contr; NSN 4931-01-388-4079, PN 408364, PR 7008405618 | Unknown Agency | Past deadline 10 months ago |
| REPLACE OBSOLETE FIRE PUMP TRANSFER SWITCH AND CONTROLLERS | Drug Enforcement Administration | Past deadline almost 56 years ago |
Recent Contract Awards for PSC 4931
Recent federal contract awards for PSC 4931. View winning contractors and award amounts.
Last updated Nov 24, 2025. For real-time data, visit the G2X GovCon Growth Platform.
Recent Contract Awards
Most recent federal contract awards for PSC 4931
Recent Contract Vehicle Awards for PSC 4931
Contract Vehicles for PSC 4931 — FIRE CONTROL MAINTENANCE AND REPAIR SHOP SPECIALIZED EQUIPMENT.
Last updated Nov 24, 2025. For real-time data, visit the G2X GovCon Growth Platform.
Recent Contract Vehicle Awards
Indefinite Delivery Vehicles (IDVs) for PSC 4931
| Recipient | Funding Agency | Ceiling | Award Date |
|---|---|---|---|
| KING NUTRONICS CORPORATION | Defense Logistics Agency | $250K | Mar 27, 2025 8 months ago |