SIC 3728 to NAICS Code Crosswalk
The legacy 1987 SIC code 3728 (Aircraft Parts and Auxiliary Equipment, NEC) maps transitively to modern U.S. Census 2022 NAICS code(s): 332912, 336411, 336413, 541713, 541714, 541715.
Concordance Concordance Mapping Asset
| Source Code | Source Industry | Target Code | Target Industry | Relation | Concordance Path |
|---|---|---|---|---|---|
| SIC 3728 | Aircraft Parts and Auxiliary Equipment, NEC | NAICS 332912 | Fluid Power Valve and Hose Fitting Manufacturing | One-to-Many | SIC1987:3728 → NAICS1997:332912 → 2002:332912 → 2007:332912 → 2012:332912 → 2017:332912 → 2022:332912 |
| SIC 3728 | Aircraft Parts and Auxiliary Equipment, NEC | NAICS 336411 | Aircraft Manufacturing | One-to-Many | SIC1987:3728 → NAICS1997:336411 → 2002:336411 → 2007:336411 → 2012:336411 → 2017:336411 → 2022:336411 |
| SIC 3728 | Aircraft Parts and Auxiliary Equipment, NEC | NAICS 336413 | Other Aircraft Parts and Auxiliary Equipment Manufacturing | One-to-Many | SIC1987:3728 → NAICS1997:336413 → 2002:336413 → 2007:336413 → 2012:336413 → 2017:336413 → 2022:336413 |
| SIC 3728 | Aircraft Parts and Auxiliary Equipment, NEC | NAICS 541713 | Research and Development in Nanotechnology | One-to-Many | SIC1987:3728 → NAICS1997:54171 → 2002:541710 → 2007:541711 → 2012:541711 → 2017:541713 → 2022:541713 |
| SIC 3728 | Aircraft Parts and Auxiliary Equipment, NEC | NAICS 541714 | Research and Development in Biotechnology (except Nanobiotechnology) | One-to-Many | SIC1987:3728 → NAICS1997:54171 → 2002:541710 → 2007:541711 → 2012:541711 → 2017:541714 → 2022:541714 |
| SIC 3728 | Aircraft Parts and Auxiliary Equipment, NEC | NAICS 541715 | Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | One-to-Many | SIC1987:3728 → NAICS1997:54171 → 2002:541710 → 2007:541712 → 2012:541712 → 2017:541715 → 2022:541715 |
Why Concordances Don't Line Up 1:1
The Standard Industrial Classification (SIC) system was established in 1937 and last updated in 1987, organizing businesses by end products. The North American Industry Classification System (NAICS) replaced it in 1997, classifying establishments by production processes. Because of this structural shift, many-to-many relationships are common, requiring chained concordance steps to bridge the historical gap.
Reverse Crosswalk: Going the other way? See the mapping at NAICS 332912 to SIC, NAICS 336411 to SIC, NAICS 336413 to SIC, NAICS 541713 to SIC, NAICS 541714 to SIC, NAICS 541715 to SIC.
Related Pages & Tools
- SIC Code 3728 Profile — Legacy OSHA definition and associated industrial metadata.
- SIC Major Group 37 Hub — Legacy category group directory.
- Interactive Crosswalk Engine — Convert any SIC or NAICS code dynamically.
Primary Ingestion Source
Data sourced from the U.S. Census Bureau Concordances (1997, 2002, 2007, 2012, 2017, and 2022 editions). Last verified on 2026-06-30.