PSC H311

Overview

The Product Service Code (PSC) is the federal classification system used to label goods and services in government procurement records, support standardized reporting in FPDS and SAM, and enable consistent spend and category analysis across agencies. The PSC Manual on Acquisition.gov is the authoritative listing of PSC entries, includes grouping and “Includes/Excludes” text, and is the basis for FPDS reporting and validation. ¹

The PSC H311 — INSPECTION- NUCLEAR ORDNANCE — classifies inspection services and related commercial testing/laboratory activities specific to nuclear ordnance; the Manual places H311 within the H3 inspection grouping used for weapons- and ordnance-related inspection work and supplies the official inclusion/exclusion language. ¹

• See also on G2X:
  • G2X — PSC H311 overview
  • G2X — PSC H211 overview
  • G2X — PSC H911 overview

What this PSC covers

• Inspection services for nuclear ordnance components and assemblies, including acceptance inspections performed to technical specifications. ¹
• Commercial testing and laboratory evaluation when directly tied to nuclear ordnance inspection requirements. ¹
• Non-medical inspection activities for ordnance materials and systems, including documentation, test reporting, and acceptance verification. ¹

Related NAICS and PSC codes

Type	Code	Descriptor
PSC	H211	Equipment and Materials Testing — Nuclear Ordnance. 1
PSC	H310	Inspection — Weapons. 1
PSC	H911	Other Quality Control, Testing, and Inspection — Nuclear Ordnance. 1

Coding and FPDS reporting

• PSC selection requirement: Federal awards must record the Product/Service Code that best identifies the procured item or service; FPDS validation requires a PSC from the PSC Manual for reporting. ²
• Description derivation: FPDS populates the PSC description from the PSC Manual entry tied to the selected 4-character code. ²

Frequently asked questions

• Q: What is the authoritative source for H311 definitions and inclusion/exclusion language?
  A: The Product and Service Code Manual on Acquisition.gov is the authoritative source for H311 and provides the official “Includes” and “Excludes” language and grouping for inspection and testing PSCs. ¹

• Q: When should H311 be used instead of H211 or H911?
  A: Use H311 when the primary requirement is inspection services specifically for nuclear ordnance; H211 covers equipment/materials testing and H911 covers other quality-control/testing/inspection variants, per PSC Manual groupings. ¹

• Q: Is a NAICS code required alongside H311 in FPDS submissions?
  A: Yes. FPDS requires a principal NAICS code in addition to the PSC; the PSC identifies the kind of service while NAICS indicates the industry classification used for reporting and analytics. ²

Useful resources

• G2X — PSC H311 overview
• Product and Service Code Manual (PSC Manual, April 2025 PDF). ¹
• FPDS glossary and data-element guidance for Product/Service Code reporting. ²

References

1. Acquisition.gov — Product and Service Code Manual (PSC Manual), April 2025 PDF: https://www.acquisition.gov/content/psc-manual-april-2025.pdf
2. FPDS — Glossary / Product or Service Code (FPDS data-element guidance): https://www.fpds.gov/help/Glossary.htm