SIC 3671 — Electron Tubes
SIC 3671 is 'Electron Tubes', a 4-digit Standard Industrial Classification (SIC) code under Major Group 36: Electronic and Other Electrical Equipment and Components (Division D: Manufacturing); it maps to modern 2022 NAICS code(s): 334419 (Other Electronic Component Manufacturing).
Description & Classification
SIC code 3671 representing 'Electron Tubes' 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 334419 - Other Electronic Component Manufacturing (via SIC1987:3671→NAICS1997:334411→2002:334411→2007:334411→2012:334419→2017:334419→2022:334419)
Classification Details
| SIC Code | 3671 |
|---|---|
| Industry Title | Electron Tubes |
| Division | Division D: Manufacturing |
| Major Group | Major Group 36: Electronic and Other Electrical Equipment and Components |
| Source / Verified | US Census 1987 SIC Concordance / 2026-06-28 |
Related Resources & Compliance Guides
Further regulatory reference links for legacy SIC code 3671:
- 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 36 Hub — View other legacy industries in this business division.
Related Industries in Major Group 36
3612 - Power, Distribution, and Specialty Trans...3613 - Switchgear and Switchboard Apparatus...3621 - Motors and Generators...3624 - Carbon and Graphite Products...3625 - Relays and Industrial Controls...3629 - Electrical Industrial Apparatus, NEC...3631 - Household Cooking Equipment...3632 - Household Refrigerators and Home and Far...
Frequently Asked Questions (FAQ)
What industry does SIC code 3671 represent?
SIC 3671 is 'Electron Tubes', a 4-digit Standard Industrial Classification (SIC) code under Major Group 36: Electronic and Other Electrical Equipment and Components (Division D: Manufacturing); it maps to modern 2022 NAICS code(s): 334419 (Other Electronic Component Manufacturing).
What is the modern 2022 NAICS mapping for SIC 3671?
SIC code 3671 maps to modern NAICS codes: 334419 - Other Electronic Component Manufacturing.