What Lee Spring does

Lee Spring is a privately held manufacturer of mechanical springs and wire-formed components, founded in 1918 in Brooklyn, New York and headquartered there at 140 58th Street. The company operates a dual revenue model: a self-serve catalog of 25,000+ stock spring designs available via e-commerce with same-day US/Canada shipping and a $40 minimum order, paired with quote-based custom spring, wire form, fourslide, and stamping manufacturing supported by an in-house engineering team. Core products span compression, extension, and torsion springs, plus proprietary lines including REDUX Wave Springs (size/weight reduction up to 50%), HEFTY Die Springs (heavy-duty, priced at one-third to one-half of competitors), LeeP Plastic Composite Springs (Ultem PEI resin, non-corrosive and chemically inert), Bantam Mini Compression Springs (wire diameters from 0.004 inches in Elgiloy alloy), Lite Pressure Springs, Belleville Washers, constant force and battery springs, MIL-SPEC MS24585/MS24586 springs, and continuous-length prototyping springs. Materials expertise covers music wire, stainless steel 301/302/316/17-7, Elgiloy, Inconel, oil-tempered MB and chrome silicon, and Ultem PEI composites.

Name

Lee Spring

Legal name

Lee Spring Company LLC

Website

https://leespring.com

Company type

Private

Founded year

1918

Operating status

Operating

Headcount range

251–500 employees

Short description

Lee Spring, founded in 1918 in Brooklyn, NY, manufactures and distributes 25,000+ stock and custom mechanical springs, wire forms, fourslide parts, and stampings globally, serving medical, aerospace, defense, electronics, and general industrial customers through e-commerce and direct sales across the US, Mexico, Europe, China, and India.

Ownership category

akta.pro rank

Headquarters

HQ city

Brooklyn

HQ country

United States

HQ region

North America

Offices8 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure, Technology or R&D

Revenue model

1. Stock Spring Sales: Sale of catalog stock springs from inventory of 25,000+ products. Same-day shipment available. E-commerce platform for online ordering.
2. Custom Spring Manufacturing: Custom springs manufactured to customer specifications. Engineering support from design through production. Quote-based pricing.
3. Wire Forms, Stampings, and Fourslide Parts: Custom manufacturing of wire forms, fourslide parts, and stampings. Materials include carbon steel, stainless steel, copper alloys, and specialty alloys.
4. Engineering and Technical Support Services: Engineering assistance from design conception through project completion. Material traceability certification, regulatory compliance documentation.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels7 records

Core offering

Lee Spring manufactures and globally distributes over 25,000 stock spring designs—including compression, extension, torsion, wave, die, plastic composite, constant force, MIL-SPEC, and miniature springs—available for same-day shipment through e-commerce and direct sales. The company also offers custom spring manufacturing, wire forms, fourslide parts, and stampings engineered to customer specifications, supported by in-house engineering and full material traceability. Operations span ISO 9001-certified facilities in the US, Mexico, Germany, the UK, China, and India, serving medical, aerospace, defense, electronics, and general industrial markets.

Product overview

Lee Spring is a global manufacturer and distributor of mechanical springs and related products, founded in 1918 and headquartered in Brooklyn, NY. The company operates a platform-plus-catalog model offering over 25,000 stock springs available for immediate shipment alongside comprehensive custom manufacturing capabilities. The core product portfolio centers on compression springs, extension springs, and torsion springs in various configurations, complemented by specialized product lines including REDUX Wave Springs for space-critical applications, HEFTY Die Springs for heavy-duty industrial use, LeeP Plastic Composite Springs for non-metallic applications, Lite Pressure Compression Springs for low-force requirements, and Bantam Mini Compression Springs for miniature precision applications. Additional offerings include Belleville Washers, Constant Force Springs, Battery Springs, Continuous Length Extension Springs, Spring Guides, MIL-SPEC Springs meeting military standards, and Spring Kits for prototyping. Beyond standard springs, Lee Spring provides custom manufacturing services for Wire Forms, Four Slide Parts, and Stampings, enabling complete solutions for diverse industrial applications across medical, pharmaceutical, aerospace, automotive, and general manufacturing sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Compression Springs Standard helical compression springs that compress when force is applied, available with closed or open ends in materials including music wire, stainless steel, and specialized alloys, for general engineering applications.
• Extension Springs Springs that absorb and store energy by creating resistance to a pulling force, featuring various end types including hooks, eyes, and loops for attachment to components across industrial applications.
• Torsion Springs Helical springs that exert torque or rotary force, designed to be actuated rotationally with options for leg configuration, angle, and direction of wind.
• REDUX Wave Springs Proprietary coiled flat wire wave springs manufactured from Type 17-7 stainless steel that replace conventional round wire compression springs in space-critical applications, reducing assembly size and weight by up to 50%.
• HEFTY Die Springs Heavy-duty metal compression springs designed for high stress and heavy load applications such as dies, clutches, brakes, and aircraft mechanisms, color-coded by load range and priced at 1/3 to 1/2 less than competitors.
• LeeP Plastic Composite Springs Patented compression springs made from Ultem PEI resin composites that are non-corrosive, non-magnetic, and chemically inert, suitable for medical, pharmaceutical, and food processing applications; available in six color-coded strength levels.
• Belleville Washers Conical washers that support high loads with relatively small deflections, used for vibration, thermal expansion, relaxation, and bolt creep problems, often stacked in various configurations.
• Constant Force Springs Springs that provide constant force over the useable range, consisting of a roll of high yield Type 301 Stainless Steel strip for counterbalances, door closers, cable retractors, and long-motion functions.
• Battery Springs Conical compression springs designed as battery contacts for AA, AAA, C and D batteries, featuring nickel-coated designs that adjust to varying battery lengths with low contact resistance.
• Continuous Length Extension Springs Extension springs available in continuous stock lengths of 12, 24, and 36 inches that can be trimmed and formed to desired lengths and end configurations for prototyping and development.
• Spring Guides Guides for springs available in both round wire and flat wire configurations to support spring alignment and performance in various applications.
• MIL-SPEC MS24585 Springs Compression springs meeting Military Standard AS24585 specifications for aerospace and defense applications, with full traceability and quality documentation.
• MIL-SPEC MS24586 Springs Extension springs meeting Military Standard AS24586 specifications for aerospace and defense applications, with full traceability and quality documentation.
• Lite Pressure Compression Springs Compression springs designed for low pressure applications (1-15 psi range) ideal for syringes, relief valves, check valves, dispensers and pistons, offered in passivated Type 316 Stainless Steel.
• Bantam Mini Compression Springs Miniature compression springs with wire diameters as small as 0.004 inches, made from Elgiloy cobalt-nickel alloy for superior strength and corrosion resistance in medical and precision applications.
• DIN-Plus Compression Springs Compression springs built on DIN2098 Part 1 and 2 specifications with added corrosion resistance through passivation and zinc plating, available in over 525 new parts.
• Drawbar Springs Unique assemblies that create extension spring function from compression springs with built-in solid stop and safety retention, eliminating overstretching risk and enabling higher loadings.
• High Pressure Springs Compression springs with heavier gauge wire in smaller diameters for high loading requirements in ball detent fixtures, quick change tooling, switches, and safety relief valves.
• Wire Forms Custom bent wire parts manufactured to exact specifications using various wire materials and shapes including round, flattened, rectangular, and shaped wire for applications beyond helical springs.
• Four Slide Parts Metalworking components produced using fourslide machines for flat springs, clips, brackets, flat terminals and other stamped and formed components at rates of 1000-4000 parts per hour.
• Stampings Custom stamping products including latches, retainers, bridging parts, special conductors, hinge components, fasteners and connector clips for telecom, electrical, aerospace, automotive, and medical applications.
• Spring Kits Comprehensive selection kits containing various sizes of compression, extension, torsion, and instrument springs housed in heavy-duty selection cases with reference charts for rapid prototyping and development.

Quantifiable outcome

• REDUX Wave Springs can reduce assembly size and weight by up to 50%
• +3 more outcomes

Named customers4 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

Feature6 records

Partnerships

Seven partnerships are on record, tiered core.

• Thomas SpringcoreStrategic or Co-development Partner · 1 February 2026Lee Spring acquired Thomas Spring in February 2026 as part of continued strategic expansion. This represents Lee Spring's ongoing growth strategy through targeted acquisitions.
• D.R. Templeman CompanycoreStrategic or Co-development Partner · 1 January 2023Lee Spring acquired D.R. Templeman Company in January 2023 to expand miniature spring and medical sector expertise, serving customers in specialized industries.
• Dayon ManufacturingcoreStrategic or Co-development Partner · 1 January 2022Lee Spring acquired Dayon Manufacturing in January 2022 to expand miniature spring capabilities. This acquisition strengthened Lee Spring's ability to serve customers requiring small-scale precision springs.
• M & S SpringcoreStrategic or Co-development Partner · 1 February 2021Lee Spring acquired M & S Spring in February 2021 to advance rapid prototype spring capabilities, enabling faster response to customer prototype and custom requirements.
• Longcroft EngineeringcoreStrategic or Co-development Partner · 1 September 2020Lee Spring acquired Longcroft Engineering in September 2020 to better serve UK and European customers with expanded local manufacturing and distribution capabilities.
• The Kirk-Habicht CompanycoreStrategic or Co-development Partner · 1 July 2019Lee Spring acquired The Kirk-Habicht Company in July 2019. Founded in 1907, Kirk-Habicht is a custom spring manufacturer in Rosedale, Maryland with modern facility expanding US manufacturing capacity.
• Clark Spring & Manufacturing, Inc.coreStrategic or Co-development Partner · 1 April 2016Lee Spring acquired Clark Spring & Manufacturing in April 2016. Founded by Eric Eckberg, Clark Spring had 30 years of operations in Hayward, California, adding significant customer presence in California.

Scale indicators5 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• MW Industries (including Associated Spring / Barnes Group): One of the largest US spring and engineered component manufacturers (parent of Associated Spring and former Barnes Group springs businesses). Direct competitor across stock, custom and precision springs serving aerospace, medical and industrial OEM customers; Lee Spring EVP Jim Callaghan previously led twelve acquisitions there.
• Century Spring: Stock and custom spring manufacturer with a broad catalog of compression, extension and torsion springs. Closely comparable to Lee Spring's catalog-plus-custom business model and engineering-buyer customer base.
• Ace Wire Spring & Form: Custom four-slide and wire-form specialist producing stampings, clips and small formed parts. Direct overlap with Lee Spring's fourslide and wire-form capabilities and with similar industrial OEM customers.
• Smalley Steel Ring: Specialty manufacturer of retaining rings, wave springs and constant-force springs. Directly comparable in the wave-spring and constant-force sub-categories where Lee Spring's REDUX and Constant Force products compete.
• Helical Products: Manufacturer of flexible couplings and helical/spring elements for aerospace, defense and industrial markets. Comparable in offering engineered metal-spring components to OEM and aerospace customers.
• Misumi USA: Catalog-driven industrial components distributor/manufacturer offering configurable springs and mechanical parts via a deep e-commerce platform. Comparable to Lee Spring's digital, catalog-based go-to-market model and broad engineer-buyer customer base.
• Bal Seal Engineering: Specialty manufacturer of spring-energized seals, canted-coil springs and electrical contacts for medical, aerospace and industrial OEMs. Overlaps with Lee Spring in specialty spring technologies and regulated end markets.
• Vulcan Spring & Manufacturing: Custom and stock spring manufacturer serving industrial, medical and consumer-products OEMs. Comparable mid-market US spring manufacturer with similar custom and stock product mix.
• John Evans' Sons (Century Spring's parent for custom): Custom spring, wire form and stamping manufacturer with capabilities closely mirroring Lee Spring's fourslide, wire-form and stamping offerings for industrial OEM customers.

Broad incumbents

• McMaster-Carr: Massive industrial catalog supplier with a deep springs assortment and unrivaled e-commerce logistics. Not a spring specialist but a key benchmark for Lee Spring's digital, same-day shipping go-to-market strategy.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/leespringllc
• Facebookfacebook.com/leespringcompanyllc
• LinkedInlinkedin.com/company/lee-spring

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries12 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Lee Spring