Customized fasteners from a certified manufacturer
- Precisely fitting screws according to drawings and technical specifications
- TÜV-tested materials with 3.1 / 3.2 certificates & certified quality
- Resistant to high pressure, extreme temperatures, or aggressive media
Special fasteners and custom fasteners are connectors that are specially developed for demanding and specific applications. They deviate from the usual DIN, ISO, or EN standards and are manufactured individually according to your drawing or technical specification – with variable dimensions, special thread profiles, materials, and surfaces. We also manufacture your special fastener.
Custom manufacturing & material selection of the special fastener
Individuality is a top priority at ASO Schrauben.
A key feature of special fasteners or connecting parts from ASO Schrauben is the flexibility in manufacturing. Depending on the technical specification, these special fasteners can be made from a variety of materials, including quenched and tempered steels, stainless steel, or special alloys. These high-quality materials are carefully selected and also pre-tested with a 3.2 acceptance certificate by TÜV to meet the specific requirements of your project – be it high strength, corrosion resistance, or pressure resistance.
Planning reliability
We guarantee that delivery dates will be met according to the order confirmation, so that you can implement your projects reliably and without delays.
Flexibility
Our offer and service include express service, short-term changes to ongoing orders, and fast delivery times even during peak periods.
Experience
Our many years of experience enable the reliable and individual production of connecting parts – even in very small quantities.
Tested Quality
We use certified EU pre-material with certificate allocation, so that you can rely on tested quality and maximum safety.
Surface finishing for good performance
We refine what connects you permanently.
The topic of surface finishing also plays a crucial role in our special screws. Through special surface treatments, the special screws can be adapted to the respective operating conditions in order to increase their functionality and longevity. Each treatment is specifically selected for the respective application and offers specific advantages, regardless of whether it is higher corrosion resistance, optimized friction properties, or an appealing appearance.
Materials for the highest demands of the special screw
Material diversity with technical precision.
The selection of the right material is crucial for the performance and service life of a special screw. Depending on the application, different metallic materials are used – from heat-resistant steels to low-temperature steels and rust and acid-resistant materials. Combinations with special coatings and heat treatments are also possible in order to optimally adapt the special screw to mechanical, thermal, or chemical loads.
An overview of the available materials and their typical areas of application can be found on our separate material page
Specialist for special fasteners in pressure equipment construction
We offer you reliability in safety-critical applications.
A particular focus of ASO Schrauben is the production of special fasteners and custom fasteners for pressure equipment. Our fasteners are used wherever maximum safety, material quality, and manufacturing precision are required – for example, in pressure vessels, flange connections, heat exchangers, valves, or steam systems, in turbine construction, and in classic mechanical engineering.
Thanks to many years of experience and modern manufacturing technologies, we produce fasteners according to drawings or special standard specifications – starting even from a quantity of 1!
Our production meets the strict requirements of the Pressure Equipment Directive (PED 2014/68/EU) and relevant regulations such as AD 2000-Merkblatt W0. The corresponding certificates (e.g. 3.1 / 3.2 according to EN 10204) document the quality and traceability of our products – a clear added value for safety-critical applications.
Advantages of a special fasteners from ASO Schrauben
- Individual production according to drawing or specification – perfectly tailored to your application
- Higher load capacity due to special materials and geometries
- Optimal accuracy of fit for secure, permanent connections
- Technical special solutions possible – e.g. special threads or special head and shaft shapes
Our fasteners types
Special fasteners and custom fasteners can be designed in very different designs and functional types. Our common fasteners types include expansion bolts, threaded rods, and stud bolts, which are often used in pressure equipment or flange connections. Other variants include cylinder head fasteners, eye bolts, or special fasteners with special thread forms. The combination of different head shapes, thread types, and materials creates highly specialized fasteners that are precisely tailored to your requirements.
Nuts
The right standard solutions and custom-made products for you.
At ASO Schrauben, we offer a large selection of hot-formed nuts for various applications – in different shapes, dimensions, and materials. In addition, we also manufacture machined nuts according to standards, drawings, or specific technical specifications. The nuts are usually made from TÜV-tested pre-material and can be certified with a 3.1 or 3.2 certificate. Whether nuts for fasteners in series production or nuts according to individual specifications for special applications, we focus on quality and reliability.
We manufacture everything for you - whether according to European or international standards!
Our special fasteners are used where standard solutions do not fit – for example, at high pressure, extreme temperatures, or aggressive media. Special fasteners made of special TÜV-tested pre-material are often the only solution in the industry for reliably implementing complex, safety-relevant applications.
Areas of application of our special fasteners / custom screws, fasteners
- Special fasteners mechanical engineering
→ For complex assemblies with high demands on precision and load capacity
- Pressure equipment construction & plant construction
→ Special fasteners and screws for pressure vessels, flanges, valves, pipelines – in accordance with relevant standards and certificates (e.g. AD 2000, PED)
- Energy technology & wind power
→ Corrosion and weather-resistant screws for outdoor use and continuous loads as well as high temperature fluctuations
- Chemical industry / Petrochemistry
- Pipeline construction
- Turbine construction
Strong Connections since 1948
As a manufacturer of special fasteners and connecting parts according to standards, we manufacture precisely, certified and according to your individual specifications
Request now without obligation