SIC 2431 — Millwork
Description & Classification
SIC code 2431 representing 'Millwork' is an industry category in the Standard Industrial Classification (SIC) system under U.S. OSHA and Federal procurement registers.
Modern NAICS Crosswalk
Trace the modern equivalent classifications in the 2022 North American Industry Classification System (NAICS) database:
- NAICS 321911 - Wood Window and Door Manufacturing (via SIC1987:2431→NAICS1997:321911→2002:321911→2007:321911→2012:321911→2017:321911→2022:321911)
- NAICS 321918 - Other Millwork (including Flooring) (via SIC1987:2431→NAICS1997:321918→2002:321918→2007:321918→2012:321918→2017:321918→2022:321918)
Classification Details
| SIC Code | 2431 |
|---|---|
| Industry Title | Millwork |
| Division | Division D: Manufacturing |
| Major Group | Major Group 24: Lumber and Wood Products, Except Furniture |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 2431:
- SIC Codes Complete Compliance Guide — Detailed history and active legal applications of the SIC classification framework.
- Why Legacy SIC Codes Persist Guide — How credit systems and the SEC still rely on SIC metadata.
- SIC ↔ NAICS Crosswalk Tool — Trace industrial code conversions dynamically.
- SIC Major Group 24 Hub — View other legacy industries in this business division.
Related Industries in Major Group 24
Frequently Asked Questions (FAQ)
What industry does SIC code 2431 represent?
SIC 2431 is 'Millwork', a 4-digit Standard Industrial Classification (SIC) code under Major Group 24: Lumber and Wood Products, Except Furniture (Division D: Manufacturing); it maps to modern 2022 NAICS code(s): 321911 (Wood Window and Door Manufacturing), 321918 (Other Millwork (including Flooring)).
What is the modern 2022 NAICS mapping for SIC 2431?
SIC code 2431 maps to modern NAICS codes: 321911 - Wood Window and Door Manufacturing, 321918 - Other Millwork (including Flooring).