PSC K039

Overview

The Product Service Code (PSC) system is a government-wide taxonomy that classifies what was bought on federal contracts and orders. PSCs enable consistent tracking, reporting, and analysis of procurement spending across systems such as FPDS and SAM. The PSC Manual (GSA/Acquisition.gov) explains PSC structure, management, and FPDS usage and is the authoritative source for PSC definitions and group listings. ¹

The PSC K039 is the service-category entry for “Modification of Equipment — Materials Handling Equipment.” In federal reporting the code identifies contract actions predominantly for modification work on materials-handling systems and components (for example, conveyor systems, warehouse trucks, hoists/cranes, and related retrofit or conversion work) and is selected in FPDS data element 8A when that activity is the predominant purchase. ¹

What this PSC covers

• Materials handling conveyor modification, retrofit, and conversion. ¹
• Warehouse trucks and self-propelled platform modification. ¹
• Hoist, winch, crane, and derrick alteration or life‑cycle upgrades. ¹
• Freight elevator and lift modernization work. ¹
• Pallet, skid, and related handling accessory modification. ¹
• Retrofit of automated storage/retrieval systems (AS/RS). ¹
• Parts and engineering changes necessary for modifications. ¹

Source: PSC Manual (service-category listing and Group 39 product descriptions). ¹

Related NAICS and PSC codes

Type | Code | Descriptor

• | - | - PSC | J039 | Maintenance, Repair, and Rebuilding of Equipment — Materials Handling Equipment PSC | N039 | Installation of Equipment — Materials Handling Equipment PSC | W039 | Lease or Rental of Equipment — Materials Handling Equipment

Source: PSC Manual service and installation categories. ¹

How this PSC is used in federal contracting

K039 is applied when modification (not simple repair, installation only, or lease) of materials‑handling equipment is the primary contract line of effort and therefore the predominant product/service for the award. Agencies should choose the PSC that best represents the predominant work reported in FPDS element 8A; installation and maintenance activities typically use N‑ or J‑series PSCs respectively, while K‑series PSCs indicate modification work. ¹

Agencies and reporting officers use FPDS guidance for data‑element selection and reporting procedures; FPDS Help documents clarify the usage of element 8A and related reporting fields. ²

Frequently asked questions

• When should a contracting officer use K039 instead of a J039 or N039?
  Use K039 when the predominant deliverable is modification or conversion of existing materials‑handling equipment (design changes, structural or systems retrofits). If the action is primarily routine maintenance or repair, use J039; if primarily installation, use N039. ¹

• Does K039 cover software upgrades to warehouse control systems (WCS) that drive conveyors?
  If the procurement is mainly mechanical or hardware modification with associated controls, K039 can apply; if the primary buy is software, IT services, or licenses, select the IT service PSC or another more specific service PSC that represents the predominant purchase. ¹

• Are there standard NAICS mappings for K039?
  The PSC Manual provides category alignment guidance, but specific NAICS selection depends on the contract’s primary industry classification and agency practices. Not specified by official sources. ¹

• Can parts procured solely for use in a modification be reported under K039?
  Yes—when parts are integral to and predominantly procured for the modification activity reported as the principal line of effort, they may be reported under K039; otherwise, select the PSC matching the primary deliverable. ¹

Useful resources

• G2X — PSC K039 page: https://app.g2xchange.com/psc/K039
• PSC Manual (Product and Service Codes Manual), GSA / Acquisition.gov. ¹
• FPDS Help — Federal Procurement Data System: data‑element usage and reporting guidance. ²

References

1. PSC Manual (Product and Service Codes Manual), U.S. General Services Administration / Acquisition.gov. https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf

2. FPDS Help — Federal Procurement Data System (FPDS) user help and data‑element guidance. https://www.fpds.gov/help/index.jsp