Precision Rings

What Precision Rings does

Precision Rings, Inc. (PRI) is a privately held, Indianapolis-based custom manufacturer of piston rings and seal rings, founded in 1949 and operating from a single facility at 5611 Progress Road. The company designs and produces specification-grade rings in diameters ranging from 0.200" (5.08mm) to 100"+ (2,540mm) using superalloys (Inconel, Stellite, Hastelloy, Waspaloy), stainless steels, titanium alloys, and engineered polymers. Manufacturing capabilities include Nadcap-approved heat treatment with furnaces to 2,250°F and deep-freeze to -100°F, CNC turning and grinding to ±.0002 accuracy, milling, and Coordinate Measuring Machine (CMM) inspection, supported by in-house engineering services spanning FEA, thermal analysis, theoretical ring leakage calculations, sealing-mechanics analysis, and 3D printer dimensional modeling. The company holds ISO 9001:2015, AS9100D, Nadcap (Aerospace Heat Treating, audit #230693), and ITAR certifications, and was recognized with GE's 2014 Supplier Quality of the Year award.

PRI's revenue model is a custom B2B quoting engine: customers submit blueprints, request reverse engineering of existing rings, or commission PRI-engineered designs, and pricing is determined per quote by material, complexity, quantity, and lead time, with expedite services available. The company sells exclusively through direct enterprise engagement, with no resellers or distribution partners, and its GTM motion targets engineers and procurement teams via technical website content, request-for-quote and design-consultation forms, and direct phone/email access to engineering staff. End markets are concentrated in aerospace & aircraft, power generation, and military & defense as primary verticals, with green energy, industrial applications, and microreactors as secondary or emerging segments. PRI employs 51-100 people and reports a global customer base, with all manufacturing performed domestically in Indianapolis.

Name

Precision Rings

Legal name

Precision rings, incorporated

Website

https://precisionrings.com

Company type

Private

Founded year

1949

Operating status

Operating

Headcount range

51–100 employees

Short description

Precision Rings, Inc. is a privately held Indianapolis manufacturer founded in 1949 that designs and produces custom piston rings and seal rings in superalloys and advanced polymers, primarily serving aerospace, power generation, and military and defense customers globally.

Ownership category

akta.pro rank

Product category

Custom Industrial Sealing Components

NAICS

Precision Turned Product Manufacturing (332721)

SIC

Gaskets, Packg & Sealg Devices & Rubber & Plastics Hose (3050)

akta.pro primary industry

Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI)

akta.pro secondary industry

Seals, Gaskets & O-Rings (Industrial Elastomer) (IMANALAC)

Keywords

• Custom piston rings
• Seal ring manufacturing
• Superalloy machining
• Aerospace component manufacturing
• Precision metal fabrication

Headquarters

HQ city

Indianapolis

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Piston and Seal Ring Manufacturing: Precision Rings designs and manufactures custom piston rings and seal rings to customer specifications. Revenue is generated through one-time custom manufacturing orders based on customer-provided blueprints, reverse-engineered existing rings, or PRI-engineered custom designs. Lead times and pricing are quote-based, varying by material, complexity, and quantity.
2. Custom Design Engineering Services: Engineering design services are bundled with custom manufacturing quotes. PRI's engineering team provides application analysis, material selection, and custom sealing solution design as part of the overall quotation package.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Precision Rings designs and manufactures custom piston rings and seal rings from 0.200" (5.08mm) to 100"+ (2,540mm) in diameter using superalloys (Inconel, Stellite, Hastelloy, Waspaloy), stainless steels, titanium alloys, and engineered polymers. The company produces expanding, contracting, one-piece, two-piece, three-piece, pinned, and marcel spring ring configurations to customer prints or its own custom designs, with tight-tolerance manufacturing (±.0002) and Nadcap-approved heat treatment. Bundled with manufacturing, PRI provides engineering design services including leakage calculations, FEA, thermal analysis, dimensional stack-up, and reverse engineering of existing rings.

Product overview

Precision Rings (PRI) is a custom manufacturer of piston rings and seal rings founded in 1949, specializing in high-precision custom components for demanding industrial applications. The product portfolio centers on Custom Piston Rings and Seal Rings as the core offerings, supported by Custom End Styles (gap configurations), Materials & Surface Treatments (superalloys and coatings), and engineering services including Piston Ring Design and Engineering, Sealing Mechanics Solutions, and Existing Ring Manufacturing/Reverse Engineering. PRI serves aerospace, power generation, green energy, military, industrial, and microreactor sectors with components ranging from 0.200" (5.08mm) to 100"+ (2,540mm) in diameter.

Differentiator

Problem solved

Functional benefit

Products and services

• Custom Piston Rings High-performance custom piston rings ranging from 0.200" (5.08mm) to 100"+ (2,540mm) in diameter, offered in expanding, contracting, one-piece, two-piece, three-piece, pinned, and marcel spring configurations for harsh environments, high pressures, extreme temperatures, and tight tolerance applications. Used by aerospace, power generation, military, industrial, and microreactor customers.
• Seal Rings
• Piston Ring Design and Engineering Services
• Existing Ring Manufacturing / Reverse Engineering Reverse engineering and reproduction services for existing piston rings and seal rings when prints are no longer available or parts are no longer offered in the marketplace. Customers submit existing rings for analysis, dimensional measurement, and remanufacturing to original or improved specifications.
• Custom Design Request Service Custom ring design service for new expanding and contracting ring applications, including analysis of operating conditions, material selection, and dimensional specifications to develop application-specific ring designs that customers can then have manufactured by PRI.

Quantifiable outcome

• Rings manufactured to +/- .0002 accuracy on CNC turning and grinding operations
• +2 more outcomes

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• MAHLE GmbH: One of the world's largest manufacturers of piston rings and engine components; serves automotive, commercial vehicle, and industrial applications globally. Closely competes with PRI on high-spec piston rings across aerospace and industrial segments.
• TPR Co., Ltd. Japanese piston ring and sintered-parts manufacturer; one of the largest non-OEM piston ring suppliers globally. Direct comparable in product category, end markets, and custom-engineered approach.
• Burgess-Norton Manufacturing Co. US-based precision manufacturer of piston pins, specialty stampings, and machined components. Operates in similar aerospace and industrial markets with a comparable custom-manufacturing model.
• Hastings Engine Parts: Manufacturer of piston rings, cylinder liners, and engine components serving industrial and aftermarket markets. Directly comparable product mix and B2B distribution approach to Precision Rings.
• Hercules Sealing Products: US-based manufacturer of custom seals, O-rings, and sealing products for fluid power, aerospace, and industrial markets. Similar niche custom-seal manufacturing focus with comparable aerospace exposure.

Emerging players

• Total Seal Inc. Specialized manufacturer of high-performance piston rings for motorsport and aftermarket applications. Smaller and narrower than PRI but overlapping on precision piston-ring design and rapid custom-engineering.

Broad incumbents

• DRiV (Tenneco / Federal-Mogul Powertrain): Major Tier-1 powertrain components supplier including piston rings and sealing components under the Goetze brand. Much broader product portfolio across global automotive and industrial markets — competes with PRI at scale but with vastly wider scope.
• SPX Technologies (Sealed Power legacy): Owns the legacy Sealed Power brand, a historic US piston ring and engine component supplier serving aftermarket and OEM. Significantly larger scale and broader product line than PRI, with overlapping channel and customer presence.
• Parker Hannifin: Global leader in motion and control technologies with an extensive sealing products division serving aerospace, hydraulics, and industrial markets. Massive scope but overlaps with PRI on aerospace sealing applications.
• Trelleborg Sealing Solutions: Major global sealing solutions provider serving aerospace, automotive, and industrial markets with a broad seal and ring portfolio. Comparable on aerospace sealing exposure but at meaningfully larger scale than PRI.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

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 Precision Rings