SIC Code 3357 — Drawing and Insulating of Nonferrous Wire

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

Code	3357
Title	Drawing and Insulating of Nonferrous Wire
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The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep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 3357

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
331319	Other Aluminum Rolling and Drawing	superseded — closest: 33131 Alumina and Aluminum Production and Processing
331422	Copper Wire (except Mechanical) Drawing	superseded — closest: 33142 Copper Rolling, Drawing, Extruding, and Alloying
331491	Nonferrous Metal (except Copper and Aluminum) Rolling, Drawing, and Extruding	331491 (same code)
335921	Fiber Optic Cable Manufacturing	335921 (same code)
335929	Other Communication and Energy Wire Manufacturing	335929 (same code)

Other SIC codes in 33xx

• 3312 — Steel Works, Blast Furnaces (Including Coke Ovens), and Rolling Mills
• 3313 — Electrometallurgical Products, Except Steel
• 3315 — Steel Wiredrawing and Steel Nails and Spikes
• 3316 — Cold-Rolled Steel Sheet, Strip, and Bars
• 3317 — Steel Pipe and Tubes
• 3321 — Gray and Ductile Iron Foundries
• 3322 — Malleable Iron Foundries
• 3324 — Steel Investment Foundries
• 3325 — Steel Foundries, Not Elsewhere Classified
• 3331 — Primary Smelting and Refining of Copper
• 3334 — Primary Production of Aluminum
• 3339 — Primary Smelting and Refining of Nonferrous Metals, Except Copper and Aluminum

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.