2022 NAICS national industry in sector 31-33 Manufacturing

332321 Metal Window and Door Manufacturing

NAICS 332321 is the US industry code for metal window and door manufacturing. This U.S.

Code: 332321 (2022 NAICS)
Title: Metal Window and Door Manufacturing
Part of: Ornamental and Architectural Metal Products Manufacturing
SBA small business limit: Up to 750 employees
Closest UK SIC: 25110 (details)

Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.

Official definition

This U.S. industry comprises establishments primarily engaged in manufacturing metal framed windows (i.e., typically using purchased glass) and metal doors. Examples of products made by these establishments are metal door frames; metal framed window and door screens; and metal molding and trim (except automotive).

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

Manufacturing wood or metal covered (i.e., clad) wood framed windows and doors are classified in U.S. Industry 321911, Wood Window and Door Manufacturing.
Manufacturing metal automotive molding and trim are classified in Industry 336370, Motor Vehicle Metal Stamping.

Source: US Census Bureau, 2022 NAICS cross-references.

Activities listed under 332321

The Census index assigns these 25 activities to this code. If your business matches one, this is your code.

Baseboards, metal, manufacturing
Casements, metal, manufacturing
Door and jamb assemblies, metal, manufacturing
Door frames and sash, metal, manufacturing
Doors, metal, manufacturing
Fire doors, metal, manufacturing
Frames, door and window, metal, manufacturing
Garage doors, metal, manufacturing
Hangar doors, metal, manufacturing
Jalousies, metal, manufacturing
Louver windows, metal, manufacturing
Molding and trim (except motor vehicle), metal, manufacturing
Rolling doors for industrial buildings and warehouses, metal, manufacturing
Sash, door and window, metal, manufacturing
Screen doors, metal frame, manufacturing
Screens, door and window, metal frame, manufacturing
Shutters, door and window, metal, manufacturing
Skylights, metal, manufacturing
Storm doors and windows, metal, manufacturing
Trim and molding (except motor vehicle), metal, manufacturing
Trim, metal, manufacturing
Weatherstrip, metal, manufacturing
Window frames and sash, metal, manufacturing
Window screens, metal frame, manufacturing
Windows, metal, manufacturing

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 332321

To count as a small business for SBA loans and federal contracts under NAICS 332321, your business (including affiliates) must not exceed 750 employees. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 2511), so treat them as a starting point and check the definition.

25110Manufacture of metal structures and parts of structuresUK SIC

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

Data last changed November 14, 2026. How this page is built.