SIC 2257 — Weft Knit Fabric Mills
Official OSHA SIC Manual Definition
Establishments primarily engaged in knitting weft (circular) fabrics or in dyeing, or finishing weft (circular) knit fabrics.
Description & Classification
SIC code 2257 representing 'Weft Knit Fabric Mills' 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 313310 - Textile and Fabric Finishing Mills (via SIC1987:2257→NAICS1997:313312→2002:313312→2007:313312→2012:313310→2017:313310→2022:313310)
- NAICS 313240 - Knit Fabric Mills (via SIC1987:2257→NAICS1997:313241→2002:313241→2007:313241→2012:313240→2017:313240→2022:313240)
Classification Details
| SIC Code | 2257 |
|---|---|
| Industry Title | Weft Knit Fabric Mills |
| Division | Division D: Manufacturing |
| Major Group | Major Group 22: Textile Mill Products |
| JSON Endpoint | View as JSON · API → |
| Source / Verified | US Census 1987 SIC Concordance / 2026-08-08 |
SIC vs NAICS Compliance & Common Mismatches
Legacy SIC code 2257 classifies commercial operations based on primary end-product or service output under the 1987 federal framework. In contrast, modern 2022 NAICS codes group establishments based on production process inputs.
When submitting public disclosures to SEC EDGAR or determining OSHA workplace safety log recordkeeping exemptions (29 CFR Part 1904), rely strictly on the official OSHA 4-digit SIC classification rather than an automated commercial translation.
💡 Expert Guidance: SIC to NAICS Conversion
Common Compliance Mistake: Many contractors and B2B analysts confuse legacy 4-digit SIC codes like 2257 with modern 6-digit NAICS codes. Ensure that you use the correct active 2022 NAICS code (e.g. from the crosswalk below) when submitting representations on SAM.gov, as federal contracting officers only accept modern NAICS codes.
Related Pages & Tools
Further regulatory reference links for legacy SIC code 2257:
- 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 2257 to NAICS Crosswalk — Bidirectional mapping to modern NAICS codes (Weft Knit Fabric Mills).
- SIC Major Group 22 Hub — View other legacy industries in this business division.
Frequently Asked Questions (FAQ)
What industry sector is represented by legacy SIC code 2257? ▾
Legacy SIC code 2257 represents 'Weft Knit Fabric Mills', categorized under Division Division D: Manufacturing and Major Group Major Group 22: Textile Mill Products. The Standard Industrial Classification (SIC) system was developed in the late 1930s.
What is the modern 2022 NAICS equivalent for legacy SIC 2257? ▾
Legacy SIC code 2257 maps to the modern 2022 NAICS industry classifications: NAICS 313310 (Textile and Fabric Finishing Mills), NAICS 313240 (Knit Fabric Mills). Mappings are resolved transitively across successive updates to handle splits.
Why do credit agencies and banks still reference legacy SIC code 2257? ▾
Registries like Dun & Bradstreet, insurance underwriters, and private platforms retain SIC code 2257 because their historical financial risk data and scoring models are indexed using the legacy 4-digit SIC framework.
Does the SEC EDGAR system allow searching public filings by SIC 2257? ▾
Yes. The SEC Division of Corporation Finance assigns a primary 4-digit SIC code to public companies. You can search the EDGAR database using SIC code 2257 to group reporting peer firms.
How do OSHA safety recordkeeping rules apply to SIC code 2257? ▾
Under 29 CFR Part 1904 safety regulations, OSHA references legacy SIC codes including 2257 to determine if a physical establishment is required to maintain daily injury logs (Form 300) or is partially exempt.
What is the structural difference between SIC 2257 and NAICS codes? ▾
SIC code 2257 classifies establishments based on their final product output or market destination (what they sell), while modern NAICS codes classify them based on production processes and inputs (how they work).
What are the typical business activities classified under legacy SIC 2257? ▾
Typical business activities classified under legacy SIC 2257 are the operations associated with 'Weft Knit Fabric Mills'. Mapped modern NAICS codes can be referenced for specific current examples.
Is legacy SIC code 2257 uniform across all 50 U.S. states? ▾
Yes, the Standard Industrial Classification (SIC) system, including code 2257, was published as a federal standard and remains uniform nationwide. It is still referenced by various state workers' compensation boards and departments of labor.
Sources & References
- U.S. Department of Labor (OSHA): OSHA Standard Industrial Classification (SIC) Manual — Code 2257
- U.S. Census Bureau: 1987 SIC to 2022 NAICS Concordance Tables
- Federal Reserve Board: Industrial Production & Capacity Utilization Classifications
- Internal Revenue Service (IRS): Schedule C Principal Business Activity (PBA) Industry Concordance
- Office of Management and Budget (OMB): Standard Industrial Classification Systems Governance