NAICS 332321

Overview

The North American Industry Classification System (NAICS) is the federal standard for categorizing business establishments to support the collection, analysis, and publication of statistics on the U.S. economy. Created under the Office of Management and Budget in 1997 to replace SIC, NAICS was developed by the U.S. Economic Classification Policy Committee in partnership with Statistics Canada and Mexico’s INEGI; the current structure in use is the 2022 vintage. ¹

NAICS 332321 — Metal Window and Door Manufacturing — covers establishments primarily engaged in manufacturing metal‑framed windows (typically using purchased glass) and metal doors. Illustrative products include metal door frames; metal‑framed window and door screens; non‑automotive metal molding and trim; and metal curtain walls. ²

What this NAICS covers

• Metal‑framed window manufacturing (typically with purchased glass). ²
• Metal door manufacturing. ²
• Fabrication of metal door frames. ²
• Metal‑framed window and door screens. ²
• Non‑automotive metal molding and trim. ²
• Metal curtain wall units and assemblies. ²

Related NAICS and PSC codes

Type	Code	Descriptor
NAICS	321911	Wood Window and Door Manufacturing
NAICS	332322	Sheet Metal Work Manufacturing
NAICS	332311	Prefabricated Metal Building and Component Manufacturing
PSC	5670	Building Components, Prefabricated

Scope notes and cross‑references

• Wood or metal‑clad wood framed windows and doors are classified in 321911, not 332321. ²
• Metal automotive molding and trim are classified in 336370, not 332321. ²
• On‑site fabrication/installation activities fall under NAICS Sector 23 (Construction) rather than manufacturing industries such as 332321. ²
• Related manufacturing of sheet metal work and ornamental/architectural metal products may be classified in 332322 or 332323 based on primary product lines. ²
• Federal product coding for prefabricated building components (e.g., door and window frames/sashes) commonly uses PSC 5670. ³

Frequently asked questions

• What products are included under NAICS 332321?

  • Metal‑framed windows and metal doors, including metal door frames, metal‑framed screens, non‑automotive metal molding/trim, and metal curtain walls. ²

• Are wood or clad‑wood windows and doors part of 332321?

  • No. Establishments making wood or metal‑clad wood windows and doors are classified in 321911. ²

• Does 332321 cover installation at the job site?

  • No. NAICS manufacturing industries exclude on‑site construction; installation or fabrication performed on site falls under Sector 23 (Construction), not 332321. ²

• Are curtain walls included in 332321?

  • Yes. Metal curtain walls are listed among example products for this industry. ²

• Which PSC is commonly used for federal buys of metal window and door components?

  • PSC 5670 (Building Components, Prefabricated) covers items like door frames and window frames/sashes and is often applicable to these products. ³

Useful resources

• G2X — NAICS 332321 overview
• U.S. Census Bureau — NAICS main page and 2022 NAICS search. ¹
• U.S. Census Bureau — NAICS 332321 definition and cross‑references. ²
• GSA — Product and Service Codes (PSC) Manual (April 2025). ³

References

1. U.S. Census Bureau. North American Industry Classification System (NAICS) — Introduction and 2022 NAICS Search. https://www.census.gov/naics/
2. U.S. Census Bureau. 2022 NAICS Definition: 332321 Metal Window and Door Manufacturing. https://www.census.gov/naics/?input=332321&year=2022&details=332321
3. U.S. General Services Administration. Product and Service Codes (PSC) Manual (April 2025). https://login.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf