NAICS 332613 Quarterly Industry Report
Spring Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 332613Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value report on Spring Manufacturing (NAICS 332613) draws on data from the U.S. Census Bureau[5], Bureau of Labor Statistics[6], and SBA size standards[7]. Published by Fair Market Value and updated quarterly, it provides valuation professionals, business owners, lenders, and brokers with industry intelligence. The editorial analysis reflects the independent assessment of FairMarketValue.com's research team.
Industry Snapshot
Key metrics for the spring manufacturing industry.
Industry Definition & Overview
Spring Manufacturing (NAICS 332613) encompasses establishments primarily engaged in manufacturing springs from purchased wire, strip, or rod Census Bureau NAICS 332613[5]. This includes coil springs, leaf springs, flat springs, torsion springs, and wire springs formed from metal stock sourced from external suppliers. Automotive suspension systems, aerospace components, industrial machinery, consumer electronics, and medical devices all rely on precision springs. Establishments cut, bend, wind, and heat-treat metal materials to produce springs meeting exacting performance specifications.
The spring manufacturing sector comprises over 140 active companies in the United States. Spring manufacturers operate as both job-shop operations serving diverse end markets and specialized producers focused on specific applications. Geographic concentration centers in the Midwest, where proximity to automotive and industrial machinery producers supports strong demand. Manufacturing processes require skilled technicians, quality control expertise, and precision tooling to meet tolerance requirements across varied product specifications.
Spring manufacturers serve as critical suppliers within longer supply chains, providing components essential to vehicle assemblies, industrial equipment, and consumer products. Per Bureau of Labor Statistics data[6], fabricated metals ranks among the largest U.S. manufacturing employment sectors. Access to raw materials, workforce availability, and proximity to end-user manufacturers influence business location and operational efficiency across the sector. Custom engineering capability is a key differentiator.
What's Included in This Industry
- Coil spring manufacturing from purchased wire or rod
- Leaf spring manufacturing for automotive suspensions
- Flat springs and plate spring fabrication
- Torsion spring production
- Compression spring manufacturing
- Extension spring and tension spring production
- Constant force and Belleville spring manufacturing
- Custom spring design and fabrication services
- Spring heat treatment and finishing operations
- Wire spring components for industrial applications
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Fabricated Metal Product Manufacturing | 332 |
| Industry Group | Spring and Wire Product Manufacturing | 3326 |
| NAICS Industry | Spring and Wire Product Manufacturing | 33261 |
| National Industry | Spring Manufacturing | 332613 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 332431 | Metal Can Manufacturing | Metal can manufacturing from tinplate and aluminum uses similar metal forming, stamping, and finishing processes as spring production but focuses on consumer packaging rather than mechanical components. |
| 332618 | Other Fabricated Wire Product Manufacturing | Other fabricated wire product manufacturing including chain link fencing, wire baskets, wire cloth, and cable products from purchased wire, sharing raw material sourcing and metalworking techniques. |
| 336330 | Motor Vehicle Steering and Suspension Components (except Spring) Manufacturing | Motor vehicle steering and suspension components manufacturing including control arms and tie rods represents a major customer classification for automotive spring products and assemblies. |
| 332722 | Bolt, Nut, Screw, Rivet, and Washer Manufacturing | Bolt, nut, screw, rivet, and washer manufacturing produces complementary fastening products using similar metalworking equipment and processes for overlapping industrial customer bases. |
| 332119 | Metal Crown, Closure, and Other Metal Stamping (except Automotive) | Metal stamping and forming including other stamped metal products created through mechanical pressing of sheet and rod stock, sharing production equipment with spring manufacturers. |
| 332312 | Fabricated Structural Metal Manufacturing | Fabricated structural metal manufacturing uses similar metal forming and joining techniques for construction components, with some manufacturers producing both structural products and spring assemblies. |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | Illinois | 12.8% | 41 |
| 2 | California | 11.3% | 36 |
| 3 | Michigan | 8.8% | 28 |
| 4 | Ohio | 7.8% | 25 |
| 5 | Texas | 7.5% | 24 |
| 6 | Pennsylvania | 7.2% | 23 |
| 7 | Connecticut | 6.3% | 20 |
| 8 | Indiana | 5.3% | 17 |
| 9 | Wisconsin | 4.4% | 14 |
| 10 | North Carolina | 4.1% | 13 |
% Of Establishments
0%
13%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
16
Total SBA Loans
$17.3M
Total Loan Volume
$1.1M
Average Loan Size
10 yrs
Average Loan Term
9.00%
Average Interest Rate
576
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: The SBA size standard for NAICS 332613 is 600 employees[7], meaning businesses with 600 or fewer employees qualify as small businesses for federal contracting and loan purposes. Small manufacturers are eligible for SBA 7(a) loans[8] and 504 loans[9] for equipment, facilities, and working capital.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | U.S. Bank, National Association | 16 | $17.3M | $1.1M |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 332613?
NAICS 332613 includes establishments manufacturing springs from purchased wire, strip, or rod. This encompasses coil spring manufacturers, leaf spring producers, wire spring specialists, and custom spring fabricators serving automotive, aerospace, industrial, and consumer electronics markets Census Bureau NAICS 332613[5].
How is the spring manufacturing industry structured?
Spring manufacturers range from small job shops with fewer than 20 employees to larger integrated operations. Some function as contract manufacturers for OEMs, while others maintain proprietary product lines. Per Bureau of Labor Statistics[6], fabricated metals is one of the largest U.S. manufacturing sectors. Many firms combine manufacturing with engineering and design services.
What is the SBA size standard for NAICS 332613?
The SBA size standard is 600 employees[7] for NAICS 332613. Businesses with 600 or fewer employees qualify as small businesses for SBA loan programs, federal contracting set-asides, and other small business programs.
How does NAICS 332613 differ from related spring manufacturing codes?
NAICS 332613 covers springs from purchased wire, strip, or rod. Related code 332611 covers heavy gauge springs using rod or strip stock. Code 332618 covers other fabricated wire products. All fall within industry group 3326 Census Bureau[10].
What industries most rely on springs from NAICS 332613?
Primary end-user industries include automotive manufacturing (NAICS 336300), industrial machinery (NAICS 333200), medical devices (NAICS 339112), aerospace, and consumer electronics Bureau of Labor Statistics[6]. Automotive suspension springs represent the largest single application segment.
What activities are included in spring manufacturing?
Spring manufacturing encompasses wire cutting, metal stock bending and coiling, heat treatment, shot peening, surface finishing, quality inspection, and product assembly Census Bureau[5]. Establishments may also perform design engineering, prototyping, and custom fabrication.
Are spring manufacturers eligible for SBA loans?
Where is spring manufacturing geographically concentrated?
Spring manufacturing concentrates in the Midwest, particularly Ohio, Indiana, Wisconsin, and Michigan, per Bureau of Labor Statistics data[11]. Proximity to automotive and industrial machinery producers drives this geographic concentration.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]Census Bureau NAICS 332613 census.gov
- [6]Bureau of Labor Statistics data bls.gov
- [7]SBA size standards sba.gov
- [8]SBA 7(a) loans sba.gov
- [9]504 loans sba.gov
- [10]Census Bureau census.gov
- [11]Bureau of Labor Statistics data bls.gov
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