What Diamond Manufacturing Company does

Diamond Manufacturing Company is a Pennsylvania-based industrial manufacturer specializing in precision perforated metal and value-added fabrication services, founded in 1915 and operating as a wholly-owned subsidiary of Reliance, Inc. (formerly Reliance Steel & Aluminum Co., NYSE: RS) since October 2010. The company operates the largest consolidated array of perforating presses in North America — 56 presses ranging from 20 to 500 tons capacity — across seven strategically located US facilities, processing approximately 100 million pounds of steel per year across 500,000 square feet of production space and maintaining over 4,000 tooling patterns. Its core products are perforated sheets, coils, and blanks in carbon steel, aluminum, stainless steel, and plastics, produced in material widths up to 84 inches and thicknesses from 0.004 to 0.500 inches.

The company layers extensive fabrication capabilities on top of perforation, including 6 laser cutting machines (2kW-9kW Fiber and CO2), 20 roller levelers, 16 shears, 13 turret presses, 10 brake presses, and 5 stamping presses, plus specialized finishing services (powder coating, anodizing, chromate conversion, electropolishing, degreasing). An in-house tooling and die shop with CNC drill presses, wire EDM, heat-treating, and automated grinding supports custom pattern creation, and engineering consultation is embedded in the sales motion. The company holds ISO 9001:2015, ISO 14001:2015, and IATF 16949:2016 certifications and reports a 99.77% product acceptance rate with a 0.23% rejection rate.

Diamond generates revenue through quote-based direct sales to B2B industrial customers across horizontal segments including HVAC, IT/rack enclosures, heavy industrials, architecture, automotive, appliances, and oil & gas. Pricing is custom per order based on material, format, thickness, hole pattern, quantity, and value-added services. The commercial model includes EDI-compatible just-in-time delivery, blanket contracts spanning months or years, ship-to-stock inspection, toll/labor-only processing, and quick-ship inventory through the Perforated Metals Plus affiliate. Family-of-companies partners Ferguson Perforating, McKey Perforating, and KMS Inc. extend capabilities across the network, all under Reliance, Inc. ownership.

Name

Diamond Manufacturing Company

Legal name

Diamond Manufacturing Company

Website

https://diamondman.com

Company type

Private

Founded year

1915

Operating status

Operating

Headcount range

251–500 employees

Short description

Diamond Manufacturing Company is a Pennsylvania-based industrial manufacturer operating the largest array of perforating presses in North America across seven US facilities, producing precision perforated metal and value-added fabricated parts for B2B customers in HVAC, IT enclosures, automotive, heavy industrials, and other industrial sectors.

Ownership category

akta.pro rank

Product category

Perforated Metal Manufacturing

NAICS

Fabricated Metal Product Manufacturing (332), Other Fabricated Metal Product Manufacturing (3329), All Other Fabricated Metal Product Manufacturing (33299), Metal Coating, Engraving (except Jewelry and Silverware), and Allied Services to Manufacturers (332812)

SIC

Sheet Metal Work (3444), Miscellaneous Fabricated Metal Products (3490), Metal Forgings & Stampings (3460)

akta.pro primary industry

Metal Cutting Tools, Tooling & Workholding (Cutters, Inserts, Chucks, Fixtures) (IMAHADAB)

Keywords

• Perforated metal manufacturing
• Metal fabrication services
• Custom metal stamping
• Industrial sheet metal
• Laser cutting services

Headquarters

HQ city

Wyoming

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Perforated Metal Products: Sale of perforated metal sheets, coils, and blanks in various materials (carbon steel, aluminum, stainless steel, plastics) with standard and custom patterns. Products can be supplied as raw perforated material or with value-added post-perforating services.
2. Fabrication and Value-Added Services: Metal fabrication services including laser cutting, stamping, forming, welding, degreasing, leveling, shearing, turret punching, and finishing services (powder coating, anodizing, electropolishing).
3. Custom Engineering and Tooling: Custom engineering design assistance and creation of specialized machine tools and stamping dies for unique customer requirements.
4. Inventory and Program Management: Just-in-time deliveries, quick-ship inventory programs, blanket contracts, and ship-to-stock programs for ongoing customer relationships.
5. Labor-Only/Toll Processing: Processing services for customer-supplied materials, offering toll processing for customers who source their own materials.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Diamond Manufacturing Company manufactures precision-perforated metal products (sheets, coils, and blanks) in carbon steel, aluminum, stainless steel, alloys, and plastics using 56 perforating presses and over 4,000 tooling patterns. The company provides comprehensive value-added metal fabrication services including laser cutting, stamping, forming, welding, leveling, shearing, turret punching, degreasing, and finishing (powder coating, anodizing, electropolishing), serving as a single-source supplier from raw materials through finished products. Custom engineering, in-house tooling design, toll/labor-only processing, and inventory/program management round out the offering for industrial B2B customers.

Product overview

Diamond Manufacturing Company is North America's largest perforated metal specialist and value-added metal fabricator, offering a comprehensive single-source solution from raw materials to finished products. The core product portfolio centers on precision perforation services using 56 perforating presses with over 4,000 tooling patterns, producing perforated sheets, coils, and blanks in carbon steel, aluminum, stainless steel, and plastics. This core perforation capability is complemented by extensive fabrication services including laser profiling (6 lasers), stamping (5 presses), turret punching (13 presses), forming (10 press brakes), leveling (20 levelers), shearing (16 shears), and specialized finishing (degreasing, welding, powder coating, anodizing, electropolishing). The company also provides custom engineering and tooling development, as well as packaging programs and inventory management services. The family of companies includes Ferguson Perforating, McKey Perforating, KMS Inc., and Perforated Metals Plus, operating seven strategically located facilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Perforated Metal Products (Sheets, Coils, and Blanks)

Quantifiable outcome

• 99.77% product acceptance rate
• +3 more outcomes

Segments7 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

Four partnerships are on record, tiered core.

• Ferguson PerforatingcoreStrategic or Co-development PartnerSister company within the Diamond family of companies, providing additional perforating capabilities as part of the full-service perforating, fabricating, and finishing network.
• McKey PerforatingcoreStrategic or Co-development PartnerSister company within the Diamond family of companies, providing additional perforating capabilities as part of the full-service perforating, fabricating, and finishing network.
• KMS Inc.coreStrategic or Co-development PartnerSister company within the Diamond family of companies, providing additional fabricating capabilities as part of the full-service perforating, fabricating, and finishing network.
• Perforated Metals PluscoreStrategic or Co-development PartnerFully stocked inventory and quick-ship facility within the Diamond family of companies, enabling rapid fulfillment of common patterns and materials.

Scale indicators9 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• RMIG: RMIG is one of the world's largest perforated metal manufacturers, headquartered in Denmark with global operations. Closely comparable to Diamond in core perforating capability, pattern library breadth, and value-added fabrication, though with broader international reach.
• McNichols Company: McNichols is a leading US distributor and processor of perforated metal, wire mesh, and gratings with extensive pattern and material inventory. Directly comparable in product offering and B2B industrial go-to-market, though more distribution-heavy than Diamond's manufacturing focus.
• Boker's, Inc. Boker's is a US manufacturer of precision metal stampings, washers, and shims with extensive tooling capabilities. Comparable to Diamond's stamping/perforating capabilities and B2B industrial customer base, particularly in flat-rolled metal processing.
• Hendrick Manufacturing: Hendrick Manufacturing is a US-based perforated metal manufacturer offering perforated sheets, coils, and fabricated products across industrial, architectural, and acoustic applications. Direct competitor with comparable product mix, customization capabilities, and B2B industrial customer base.
• Ferguson Perforating: Ferguson Perforating is a sister company within the Diamond Manufacturing family (both owned by Reliance, Inc.) providing additional perforating capabilities across the full-service network. Operates as a closely comparable direct peer with shared ownership and complementary geographic reach.
• McKey Perforating: McKey Perforating is a sister company of Diamond Manufacturing under Reliance, Inc., specializing in perforated metal products. Operates as part of the same family of companies with shared customer base and product offerings.
• Metalex (a P&H Company): Metalex is a US perforated and expanded metal manufacturer producing custom and standard metal products for industrial and architectural applications. Direct peer in perforated metal manufacturing with overlapping end-markets and fabrication services.
• National Perforating Corporation: National Perforating Corporation is a US perforated metal manufacturer specializing in custom perforating for filtration, noise control, and industrial applications. Comparable to Diamond in custom perforation services and industrial customer segments.
• Harrington & King Perforating: Harrington & King is a long-standing US perforated metal manufacturer producing perforated sheets, coils, and fabricated components. Direct competitor in industrial and architectural perforated metal markets with similar customization and finishing capabilities.

Broad incumbents

• Reliance, Inc. Reliance, Inc. (NYSE: RS, formerly Reliance Steel & Aluminum) is Diamond Manufacturing's parent company and one of the largest metals service center companies in North America. Comparable as the broader metals services and fabrication incumbent within which Diamond operates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

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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 Diamond Manufacturing Company