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Quality from Rüthen since 1968

Special connections require trust.

Your specialist for special screws, drawing parts and innovative fastening technology.

Industry Solutions

We deliver safety for the world's most demanding applications.

Wind Energy

Extreme tensile strength for tower and blade connections that defy wind and weather.

Bridge Construction

Massive fasteners for infrastructure projects with the highest safety requirements.

Aerospace

Precision components made of special alloys for maximum performance at minimum weight.

Mechanical Engineering

Wear-resistant components for continuous use in complex manufacturing systems.

Oil & Gas

Corrosion-resistant special solutions for harsh offshore use under high pressure.

Nuclear Technology

Certified safety parts, documented and manufactured according to the strictest standards.

Shipbuilding

Seawater-resistant connections for maximum durability on the world's oceans.

Railway Vehicles

Heavy-duty components for safety and reliability in rail transport.

Crane & Lifting Technology

High-strength fasteners for maximum safety when lifting heavy loads.

Raw material for special screw stainless steel CNC machined blank thread Finished special screw hexagon Quality inspection special screw measuring equipment
Material & Analysis

Intensively Tested Raw Materials

Comprehensive quality control through 100% positive material identification and hardness testing using spectral analysis and Brinell hardness testing.

CNC Machining

Complex Machining Technology

Production of complex drawing parts on CNC-controlled machining centers.

Thread Rolling

Precise Shaping

Chipless thread forming up to Ø 200 mm guarantees maximum load-bearing capacity of the screw connection.

Final Inspection

Quality Assurance

Ensuring quality through ultrasonic and surface crack testing as well as 3D measurement technology.

Product Portfolio

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Standard Parts

Fasteners e.g. acc. to DIN 2510, DIN 939 and ASME.

Details

Drawing Parts

Machining ranges for turning technology up to Ø450 and 3500 mm length and for milling technology up to 1200 x 650 x 4200 mm. Flame, laser, turned, milled, cast and formed parts.

Details

Materials

Special materials acc. to DIN EN 10269, high-temperature steels, non-ferrous metals (titanium, aluminum) and tempered steels.

Details

Upset Forged Parts

Heavy-duty upset forged parts with optimized grain flow for maximum strength and safety.

Details

Surfaces (Cooperation)

In cooperation, we finish surfaces for durability and function. Galvanizing, coating and more for optimal protection.

Details

Fasteners e.g. acc. to DIN 2510, DIN 939 and ASME.

Details

Machining ranges for turning technology up to Ø450 and 3500 mm length and for milling technology up to 1200 x 650 x 4200 mm. Flame, laser, turned, milled, cast and formed parts.

Details

Our Technologies for Precision, Safety and Durability

Icon Deep Hole Drilling

Deep Hole Drilling

Precise deep hole drilling technology for components with high demands on dimensional accuracy and surface quality, even at large drilling depths and with demanding materials.

Icon Surface Treatment Technology

Surface Treatment Technology

For improving corrosion protection, wear resistance and service life of components in demanding industrial environments.

Icon Machining Technology

Machining Technology

High-precision machining technology for complex component geometries from single parts to series production with a focus on quality and process reliability.

Icon Non-Destructive Testing

Non-Destructive Testing

Testing technology for the early detection of material defects and for ensuring the highest quality and safety standards.

Icon Thread Rolling Technology

Thread Rolling Technology

Efficient thread rolling technology for the production of heavy-duty threads with improved strength, surface quality and durability.

Icon Upset Forged Parts

Upset Forged Parts

Production of upset forged parts for resilient components with optimal material utilization, ideal for applications with high mechanical requirements.

Our Milestones

1968

Foundation

Business Registration

Official start of Köhne Spezialschrauben GmbH & Co. KG.

1975

Production

Special Screws

Start of specialized production – the cornerstone of our success.

1995

Location

Expansion to Rüthen

Relocation to the Lindental industrial area in Rüthen (Soest district, NRW) to expand production capacities.

2012

Technology

Deep Hole Drilling

Integration of high-precision deep hole drilling technology for site expansion.

2026

Future

Takeover

Continuation of the company tradition by Ziad Faidi as of 1. January 2026.

Certificates & Downloads

Our quality promise in black and white. Here you will find all current certifications.

DIN EN ISO 9001:2015

Quality Management

Download PDF

AD 2000-Specification W0

Pressure Equipment Directive

Download PDF

Pressure Equipment Directive

2014/68/EU

Download PDF

Contact Us

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