Special fasteners
Products
Special bolts, stud bolts, nuts and washers
When standard fasteners do not meet the requirements for material selection, strength or documentation, custom-made fasteners may be the right solution. Otto Olsen supplies special bolts, stud bolts, nuts and washers manufactured according to drawings, standards or customer specifications. We provide technical advice and material selection for demanding applications in industry, energy, offshore and process plants.
When standard fasteners are not enough
Do you have needs that are not covered by off-the-shelf products? From small series to larger industrial deliveries, we work to deliver the right solution tailored to your needs.
We help you when the demands are high for:
Contact a specialist in the department
- Material selection
- Tolerances and strength
- Corrosion resistance
- Temperature resistance
- Chemical resistance
- Traceability and documentation
Features and benefits
Custom-made fasteners allow for the ability to customize material selection, geometry, and documentation requirements to the application. This is especially important in environments where standard fasteners do not provide sufficient performance or service life.
The benefits include optimal material adaptation, improved corrosion resistance, higher strength, reduced maintenance requirements and documented traceability. The components can be manufactured according to customer drawings, 3D models or specific functional requirements.
Materials we supply
We offer a wide range of materials, including:
- Carbon steel (8.8, 10.9, 12.9, 45H)
- Stainless steel (A2, A4, A4-80, Duplex and Super Duplex)
- Aluminium
- Brass and bronze
- Titan
- Nickel-based alloys such as Inconel, Monel and Hastelloy
- Plastics and composites such as PEEK, PTFE and PA
Not sure about the right material? We will help you make a choice based on environmental conditions, load and expected lifespan.
Products we supply
We produce and supply, among other things:
- Special bolts: can be supplied in a variety of designs, including hexagon bolts, Allen bolts, tension bolts, shoulder bolts and stud bolts.
- Nuts: specialty nuts, including lock nuts, flange nuts and custom solutions.
- Washers: can be supplied as flat washers, spring washers, insulating washers or specially designed components adapted to the application.
All products can be delivered by:
- ISO, DIN, EN or ASTM standards
- Customer drawing or 3D model
- Functional and performance requirements
Surface treatment and quality
For the best possible performance and lifespan, we offer several types of surface treatment:
- Zinc
- Zinc-nickel
- Hot-dip galvanizing
- Pickling and passivation
- PTFE (Xylan)
- MoS₂ and other lubricating coatings
Deliverables may include:
- Material certificate EN 10204 3.1
- Material certificate EN 10204 3.2
- Certificate of Conformity (CoC)
- Measurement reports
- Traceability documentation
- PPAP and FAI if needed
Typical applications
Specialty bolts, stud bolts, nuts and washers are used in applications where the requirements for strength, corrosion resistance and documentation are higher than what standard fasteners can offer.
Typical applications are found in:
- Industry and production
- Energy and offshore
- Construction and infrastructure
- Transportation and vehicles
- Machinery and process industry
Contact us for custom-made fasteners
Do you need special bolts, stud bolts, nuts or washers manufactured according to drawings or specifications?
Please send us an inquiry with a drawing, specification or description of your need. We will help you find the right solution.
Do you have any questions?
Send us a message or contact the department directly if you want help finding the solution that is right for you.