335921 — Fiber Optic Cable Manufacturing
Description
This U.S. industry comprises establishments primarily engaged in manufacturing insulated fiber optic cable from purchased fiber optic strand (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Manufacturing unsheathed fiber optic materials--are classified in Industry 32721, Glass and Glass Product
- Manufacturing; and
- Manufacturing insulated nonferrous wire and cable from purchased wire--are classified in U.S. Industry
- 335929, Other Communication and Energy Wire Manufacturing.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3357 - Drawing and Insulating of Nonferrous Wire (via SIC1987:3357→NAICS1997:335921→2002:335921→2007:335921→2012:335921→2017:335921→2022:335921)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 6015 — Fiber Optic Cables
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 335921 valid in 2022? ▾
Yes, 335921 is a valid 6-digit 2022 NAICS national industry code representing 'Fiber Optic Cable Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 335921? ▾
The Small Business Administration (SBA) has established a small business size standard of 1,000 employees for NAICS code 335921 (Fiber Optic Cable Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 335921? ▾
According to official Census Bureau concordance tables, NAICS code 335921 (Fiber Optic Cable Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3357 - Drawing and Insulating of Nonferrous Wire.
Related Pages & Tools
Further regulatory reference links for NAICS code 335921:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 335921 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Fiber Optic Cable Manufacturing).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.