332321 — Metal Window and Door Manufacturing
Description
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) (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- 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; and
- Manufacturing metal automotive molding and trim--are classified in Industry 336370, Motor Vehicle Metal
- Stamping.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3442 - Metal Doors, Sash, Frames, Molding, and Trim (via SIC1987:3442→NAICS1997:332321→2002:332321→2007:332321→2012:332321→2017:332321→2022:332321)
- SIC 3449 - Miscellaneous Structural Metal Work (via SIC1987:3449→NAICS1997:332321→2002:332321→2007:332321→2012:332321→2017:332321→2022:332321)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 9535 — Plate, Sheet, Strip, and Foil: Nonferrous Base Metal
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 332321 valid in 2022? ▾
Yes, 332321 is a valid 6-digit 2022 NAICS national industry code representing 'Metal Window and Door Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 332321? ▾
The Small Business Administration (SBA) has established a small business size standard of 750 employees for NAICS code 332321 (Metal Window and Door Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 332321? ▾
According to official Census Bureau concordance tables, NAICS code 332321 (Metal Window and Door Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3442 - Metal Doors, Sash, Frames, Molding, and Trim, 3449 - Miscellaneous Structural Metal Work.
Related Pages & Tools
Further regulatory reference links for NAICS code 332321:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 332321 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Metal Window and Door Manufacturing).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.