PSC 4921: Torpedo Maintenance, Repair, and Checkout Specialized Equipment
4921 is the product and service code (PSC) federal agencies use for torpedo maintenance, repair, and checkout specialized equipment, in the maint/repair shop 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
- 2
- Spending, FY2026
- $2.1 million
- Share to small businesses
- 96%
Open contracts with PSC 4921, due soonest
- TEST SET SUBASSEMBL
✦ The Navy's supply office in Mechanicsburg (NAVSUP Weapon Systems Support) wants to buy a test set subassembly made to listed drawings.
Due in 27 daysNov 5, 2026
Where 4921 sits in the PSC Manual
- Category: Product
- Group 49: Maint/Repair Shop Eqpt
- Code 4921: Torpedo Maintenance, Repair, and Checkout Specialized Equipment
NAICS codes used with PSC 4921
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with 4921 most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 333310 | Commercial and Service Industry Machinery Manufacturing | $2.6 million |
| 332312 | Fabricated Structural Metal Manufacturing | $1.4 million |
| 334515 | Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals | $1.1 million |
| 339999 | All Other Miscellaneous Manufacturing | $330,694 |
| 333998 | All Other Miscellaneous General Purpose Machinery Manufacturing | $329,766 |
| 335999 | All Other Miscellaneous Electrical Equipment and Component Manufacturing | $309,668 |
Who buys under PSC 4921
Agencies with the most contract dollars under 4921 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Defense Logistics Agency | $3.7 million |
| Department of the Navy | $3.3 million |
| U.S. Coast Guard | $99,249 |
Federal spending under PSC 4921 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $2.6 million |
| FY2025 | $2.4 million |
| FY2026 | $2.1 million |
| FY2027 (so far) | $0 |
Who wins PSC 4921 contracts
| Company | Obligated, last 3 years |
|---|---|
| Loughmiller Machine, Tool & Design | $1.4 million |
| Bloomy Controls Inc | $977,140 |
| Central Metal Fabricators Inc | $943,088 |
| Ordnance Technology Service, Inc. | $788,024 |
| Dumbo Defense Inc | $316,720 |
| U.S.a. Spares Inc. | $278,829 |
| Centroid, Inc. | $248,726 |
| A.G.H. Industries, LLC | $160,800 |
| MTC Engineering, LLC | $155,319 |
| Spencer Industries Inc | $140,916 |
Related PSC codes
- 4910 Motor Vehicle Maintenance and Repair Shop Specialized Equipment
- 4920 Aircraft Maintenance and Repair Shop Specialized Equipment
- 4923 Depth Charges and Underwater Mines Maintenance, Repair, and Checkout Specialized Equipment
- 4925 Ammunition Maintenance, Repair, and Checkout Specialized Equipment
- 4927 Rocket Maintenance, Repair and Checkout Specialized Equipment
- 4930 Lubrication and Fuel Dispensing Equipment
- 4931 Fire Control Maintenance and Repair Shop Specialized Equipment
- 4933 Weapons Maintenance and Repair Shop Specialized Equipment
- 4935 Guided Missile Maintenance, Repair, and Checkout Specialized Equipment
- 4940 Miscellaneous Maintenance and Repair Shop Specialized Equipment
Frequently asked questions
What is PSC 4921?
4921 is the product code in the federal Product and Service Code (PSC) Manual for torpedo maintenance, repair, and checkout specialized equipment, under 49 (Maint/Repair Shop 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 4921?
Most federal contract dollars under PSC 4921 go with NAICS 333310 (Commercial and Service Industry Machinery 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 4921?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 2 open notices use PSC 4921 right now. FedReady can match new ones to your business and email you, free.