PSC codes explained

What a PSC is

A Product Service Code, or PSC, is a four character code that classifies what the government is buying on a given contract action. Every notice on SAM.gov carries one. Every award reported to FPDS carries one. The codes are maintained by the General Services Administration and published in the PSC Manual on acquisition.gov.

Product codes start with a digit. They come from the Federal Supply Classification, the same four digit groups that begin every National Stock Number. A PSC of 1560 means airframe structural components. A PSC of 5340 means hardware, commercial. Service codes start with a letter. J means maintenance and repair of equipment, R means professional and support services, and so on.

Because product PSCs and NSN groups share the same first four digits, a shop that makes parts can move between the two without translation. The class on the drawing package is usually the PSC on the notice.

How PSC and NAICS pair on a notice

Each solicitation carries one NAICS and one PSC. The NAICS describes the industry expected to perform the work and sets the size standard. The PSC describes the item or service. They answer different questions, and buyers pick them separately.

That is why a single PSC shows up under many NAICS codes. Machined fittings under PSC 4730 may be posted under Machine Shops one month and under an aircraft parts code the next. If you search only by NAICS you miss the second notice. If you search by PSC you catch both.

The reverse is also true. One NAICS covers many PSCs. A machine shop code will appear on notices for fittings, brackets, housings, pins, and shafts. Searching by NAICS alone floods you with parts you do not make. Layer the PSC on top and the list gets useful.

Why buyers and records lean on PSC

Inside an agency, the PSC is how spend gets categorized. Category managers, small business offices, and DLA item managers look at buys by PSC. When a buyer asks what they spent last year on bearings, the answer comes from the PSC field, not the NAICS field.

FPDS and USAspending let you filter award history by PSC. So does the contract opportunities search on SAM.gov. When you want to know who bought a class of part, who won it, and when it will come around again, PSC is the cleanest cut through the data. This site's award history and recompete views are built around PSC and NAICS together for that reason.

Buyers also use PSC to check whether a product is covered by a rule. Some rules about domestic content, specialty metals, or item unique identification are applied by product class. Reading the PSC tells you which set of clauses to expect before you open the attachments.

Service codes you may see as a shop

Most of what a parts supplier sells is a product, so the digit codes above do most of the work. A few letter codes still matter.

• J codes cover maintenance, repair, and rebuilding of equipment. Overhaul and repair of an assembly you make often posts under a J code paired with the product class, for example J015 for aircraft components.
• K codes cover modification of equipment.
• H codes cover quality control, testing, and inspection services. Independent test labs live here.
• N codes cover installation of equipment.

If you offer repair as well as new manufacture, add the matching J class to your searches. Many recompetes for repair contracts sit under a J code and never appear in a product search.

How to use PSC in your search routine

Start from your own part numbers. Take the NSNs or drawing numbers you have made and note the first four digits of each NSN. Those are your product classes. You will probably find that a handful of classes cover most of your work.

In SAM.gov, save a search that combines those PSCs with your NAICS codes and the set-aside types you qualify for. In USAspending, run the same PSC filter over the last few years to see which buying offices post in those classes and who won. Those two lists, buyers and winners by PSC, are the start of a target list.

You can also list PSCs on your SAM.gov record. Buyers rarely search by it there, but it helps a small business specialist match you to a requirement.