SIC Code 3559 — Special Industry Machinery, Not Elsewhere Classified

4-digit industry in the 1987 Standard Industrial Classification — still requested by banks, insurers, SEC filings and legacy systems.

Code	3559
Title	Special Industry Machinery, Not Elsewhere Classified
System	SIC 1987 (final edition — replaced by NAICS in 1997)

The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep requesting it. That is why converting between the two systems is still routine work.

NAICS equivalents of SIC 3559

From the official U.S. Census concordance (1987 SIC → 2002 NAICS). Where the 2002 code no longer exists in NAICS 2022, the closest current code is shown.

NAICS 2002	Title (2002)	Current 2022 code
332410	Power Boiler and Heat Exchanger Manufacturing	332410 (same code)
333111	Farm Machinery and Equipment Manufacturing	333111 (same code)
333220	Plastics and Rubber Industry Machinery Manufacturing	superseded — closest: 3332 Industrial Machinery Manufacturing
333295	Semiconductor Machinery Manufacturing	renumbered — now 333242 (same title)
333298	All Other Industrial Machinery Manufacturing	renumbered — now 333248 (same title)
333319	Other Commercial and Service Industry Machinery Manufacturing	superseded — closest: 33331 Commercial and Service Industry Machinery Manufacturing

Other SIC codes in 35xx

• 3511 — Steam, Gas, and Hydraulic Turbines, and Turbine Generator Set Units
• 3519 — Internal Combustion Engines, Not Elsewhere Classified
• 3523 — Farm Machinery and Equipment
• 3524 — Lawn and Garden Tractors and Home Lawn and Garden Equipment
• 3531 — Construction Machinery and Equipment
• 3532 — Mining Machinery and Equipment, Except Oil and Gas Field Machinery and Equipment
• 3533 — Oil and Gas Field Machinery and Equipment
• 3534 — Elevators and Moving Stairways
• 3535 — Conveyors and Conveying Equipment
• 3536 — Overhead Traveling Cranes, Hoists, and Monorail Systems
• 3537 — Industrial Trucks, Tractors, Trailers, and Stackers
• 3541 — Machine Tools, Metal Cutting Types

Data: 1987 SIC titles (OSHA/Census) and official Census concordance — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.