Associated Spring

What Associated Spring does

Associated Spring, founded in 1857 and headquartered in Farmington, United States, designs and manufactures precision springs, washers, stampings, and engineered metal components serving demanding industries including aerospace, defense, transportation/automotive, medical devices, power generation, and consumer products. The company operates as the flagship brand of Associated Metal Forming Technologies (AMFT), a platform consolidating six complementary precision manufacturing brands: Associated Spring, Hänggi, AH Metal Solutions, E. Winkemann, Sko-Die, and P&B. Core manufacturing capabilities span wire coiling (0.0001"–0.675" diameter), flat coiling, micro coiling, stamping (0.003"–0.250" thickness), multi-slide forming, fourslide forming, tooling design and fabrication, assembly, in-house heat treating, finishing processes, and CNC machining. The company works with an extensive material range including stainless steel, titanium, Inconel, chrome silicon, chrome vanadium, copper alloys, beryllium, brass, carbon strip, super alloys, and music wire.

The business operates a custom, quote-driven B2B enterprise sales model with direct engagement to customer engineering teams. Products are built-to-spec for mission-critical applications such as aerospace landing gear shock absorption, flight control systems, engine valve springs, defense equipment, automotive suspensions and transmissions, and endoscopic guide-wire coils for medical devices. A dedicated Special Orders Department provides rapid prototype and short-run custom solutions under TS16949, ISO14001, and ISO13485 certifications, enabling the company to serve automotive, environmental, and medical device customers. Associated Spring is owned by One Equity Partners, a middle-market private equity firm, and in June 2025 acquired Sko-Die, Inc. to expand precision metal stamping and steel lamination capabilities. The company maintains a global manufacturing footprint across six countries — U.S. (Pennsylvania, Wisconsin), Brazil, Mexico, Singapore, and Thailand — to deliver local responsiveness with global supply chain consistency. Customer acquisition occurs primarily through the AMFT corporate website with quote-request functionality, reflecting a consultative enterprise field sales motion targeting engineering and procurement teams in regulated industries.

Name

Associated Spring

Legal name

Associated Spring Inc.

Website

http://asbg.com

Company type

Private

Founded year

1857

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Associated Spring, founded in 1857, designs and manufactures precision springs, washers, stampings, and engineered metal components for aerospace, defense, transportation, medical, power generation, and consumer products industries, operating six-country global manufacturing facilities under the AMFT platform owned by One Equity Partners.

Ownership category

akta.pro rank

Headquarters

HQ city

Farmington

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Precision Springs and Metal Components Sales: Associated Spring generates revenue through the design, manufacturing, and sale of precision springs, washers, stampings, and engineered metal components. Products are custom-built-to-spec for demanding industries including aerospace, defense, transportation, medical, power generation, and consumer products. The company operates on a project-based, custom manufacturing model with quote-driven sales for enterprise customers.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Associated Spring manufactures precision springs, stampings, and custom metal-formed components for demanding applications. Its capabilities include wire coiling, flat coiling, micro coiling, stamping, and multi-slide forming for industries such as aerospace, defense, transportation, medical, power generation, and consumer products. The company operates a global manufacturing footprint across Brazil, Mexico, Singapore, Thailand, and the United States.

Product overview

Associated Spring is part of Associated Metal Forming Technologies (AMFT), a precision spring and metal components manufacturer established in 1857. The company operates as a platform combining six renowned brands: Associated Spring (core product), Hänggi, AH Metal Solutions, E. Winkemann, Sko-Die, and P&B. The product portfolio includes compression springs, torsion springs, extension springs, flat springs, constant force springs, precision stampings, and various washers (Belleville, wave, finger washers), serving aerospace, defense, transportation, medical, power generation, and consumer products industries. Manufacturing capabilities span wire coiling (0.0001 to 0.675 diameter), stamping (0.003 to 0.250 thickness), multi-slide forming, CNC machining, heat treating, and finishing processes, with global facilities in Brazil, Mexico, Singapore, Thailand, and the U.S. (Pennsylvania and Wisconsin).

Differentiator

Problem solved

Functional benefit

Brands

• AMFT - Associated Metal Forming Technologies: Parent company bringing together six renowned brands: Associated Spring, Hänggi, AH Metal Solutions, E. Winkemann, Sko-Die, and P&B for precision springs, washers, stampings, and engineered metal components.

Products and services

• Precision Springs

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Sko-DiecoreStrategic or Co-development Partner · 24 June 2025Associated Spring acquired Sko-Die, Inc., a Morton Grove, Illinois-based manufacturer of precision metal stampings and custom steel laminations. Founded in 1947, Sko-Die has established presence in industrial, aerospace, and precision manufacturing markets. This acquisition strengthens Associated Spring's precision manufacturing capabilities and expands its product portfolio.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Smalley Steel Ring Company: Smalley manufactures precision retaining rings, spiral washers, and constant-section wave springs for demanding applications. Directly comparable because they compete head-to-head in precision spring/washer markets for aerospace, automotive, and industrial customers with similar customization capabilities.
• Boker's Inc. Boker's manufactures custom and standard washers, shims, and precision metal stampings. Comparable because of overlap in stamping and washer product categories and a similar B2B custom-quote sales motion.
• Lee Spring: Lee Spring is a direct competitor manufacturing stock and custom precision springs (compression, torsion, extension, flat) and wire forms. Comparable because they serve overlapping aerospace, medical, automotive, and industrial customers with a similar catalog-plus-custom model.
• Bal Seal Engineering: Bal Seal specializes in precision-engineered springs (cantilever coils), seals, and electrical contacts for medical, aerospace, and industrial markets. Comparable because of overlapping medical device and aerospace focus and similar high-mix, low-volume custom engineering model.
• Rotor Clip Company: Rotor Clip manufactures retaining rings, snap rings, and wave springs for automotive, industrial, and aerospace applications. Comparable because of overlapping product categories (snap rings, wave springs) and similar industrial customer base.
• Wermke Spring & Stamping: Wermke is a precision spring and metal stamping manufacturer serving medical, aerospace, and industrial markets. Comparable for its similar custom engineered solutions model and overlap in micro coiling and fourslide forming capabilities.
• Vulcan Spring & Manufacturing: Vulcan Spring is a custom manufacturer of precision springs, wire forms, fourslide components, and stampings. Comparable because they offer similar capabilities (coiling, fourslide, stamping) to overlapping industrial and consumer customers.

Broad incumbents

• Saint-Gobain Performance Plastics: Saint-Gobain is a global industrial conglomerate with precision components and engineered materials for aerospace, medical, and industrial markets. Comparable as a broad incumbent supplying engineered components, though it spans many product categories beyond springs and stampings.
• MW Industries (MWI): MW Industries is a portfolio of precision engineered component manufacturers (including spring and stamping brands) serving aerospace, medical, and industrial markets. Comparable because of its multi-brand platform structure and similar focus on precision springs and stampings.
• Trelleborg AB: Trelleborg is a large diversified industrial polymer and sealing solutions company with a precision components business serving aerospace, automotive, and medical. Comparable as a broad incumbent that competes in precision engineered components, though with broader scope than Associated Spring's spring/stamping focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/associated-spring

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries5 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 Associated Spring