PSC H266

Overview

The Product Service Code (PSC) system standardizes federal procurement classification to identify the types of goods and services purchased across government acquisitions. PSCs support reporting systems such as FPDS and SAM and are published and maintained through the PSC Manual on Acquisition.gov to enable consistent tracking, spend analysis, and category management across agencies. ¹

PSC H266 is defined in the PSC Manual as the category for equipment- and materials-testing related to instruments and laboratory equipment. Agencies assign this PSC when the principal contract line item delivers instruments or laboratory testing equipment; the PSC Manual is the governing source for the official descriptor and code status. ¹

• See also on G2X:
  • G2X — PSC H266 overview
  • G2X — PSC H265 overview
  • G2X — NAICS 334516 overview

What this PSC covers

Source: PSC Manual. ¹

• Laboratory measuring instruments
• Analytical and diagnostic instruments
• Calibration and test instruments
• Environmental and physical‑property testing devices
• Laboratory support equipment and accessories
• Instrumentation components used primarily for testing

Related NAICS and PSC codes

Type | Code | Descriptor

• | - | -
• PSC | H265 | Equipment and Materials Testing — Medical, Dental, and Veterinary Equipment and Supplies
• PSC | H266 | Equipment and Materials Testing — Instruments and Laboratory Equipment
• PSC | H267 | Equipment and Materials Testing — Photographic Equipment

Source: PSC Manual. ¹

Reporting and procurement context

Agencies must report the PSC that best identifies the product or service procured when filing contract actions into FPDS; PSC entries come from the PSC Manual and are used for spend analysis and category alignment across federal acquisition reporting. FPDS requires selection of a valid PSC from the manual when completing contract-data reporting. ²

PSC category alignment and spend categories

The government publishes PSC category-alignment resources that map PSCs into government‑wide spend categories for category management and analysis. The Category Alignment files on Acquisition.gov provide the official mappings used for spend analytics and strategic sourcing. ³

Frequently asked questions

• When should contracting officers use PSC H266?
  Use PSC H266 when the primary deliverable is instruments or laboratory equipment used for testing or measurement and when that code best represents the contract’s value; FPDS requires selection of a valid PSC from the PSC Manual. ²

• Does the PSC Manual list specific “includes” and “excludes” for H266?
  Not specified by official sources. The PSC Manual provides the descriptor for H266 but does not enumerate an exhaustive includes/excludes list for every subcomponent or accessory. ¹

• Is there an official PSC-to-NAICS crosswalk for H266?
  Not specified by official sources. PSC and NAICS are distinct reporting elements; Acquisition.gov publishes category-alignment resources, but an authoritative one-to-one PSC→NAICS crosswalk is not provided in the PSC Manual. ¹

• Where to confirm code status or recent PSC updates?
  The authoritative status and updates to PSCs are published on Acquisition.gov in the PSC Manual and associated data files; agencies and FPDS reflect those updates per their implementation schedules. See the PSC Manual pages for official change notices. ¹

Useful resources

• G2X — PSC H266 overview
• Product and Service Code Manual (Acquisition.gov — PSC Manual April 2025)
• FPDS glossary and data‑element guidance (FPDS.gov)
• PSC Category Alignment and PSC Manual archives (Acquisition.gov)

References

1. https://www.acquisition.gov/content/psc-manual-april-2025.pdf
2. https://www.fpds.gov/help/Glossary.htm
3. https://www.acquisition.gov/psc-manual/archives