Technical Information on Fastening Technology

Our engineers are experts in fastening technology. On these pages, you can find their curated technical knowledge on screws, nuts, and bolted joints as a free resource for anyone interested in fastening technology. In addition, we also provide technical information on electrical engineering, operating and control elements, as well as sealing and flow control technology.

If you have specific questions or challenges that are not covered by the technical information here, please contact us.

Technical Information about Screws, Bolts, Nuts, and More

General Tables and Standards

• The SI System and conversion charts

Materials Screws and Nuts

• Definition of mechanical properties for screws
• Screws, property class 4.6 to 12.9
• Nuts, property classes 04 to 12
• Set screws, property classes 14 H to 45 H
• Marking screws, bolts, and nuts
• Screws and nuts for high and low temperatures
• Stainless steel fasteners
• Fasteners of various materials

Corrosion

• Corrosion protection

Arrangement, Design, and Assembly

• Estimation of screw diameters / selection of fasteners
• Fatigue resistance
• Length of engaged thread
• Surface pressure when mounted
• Friction and friction coefficients
• Tightening method / tightening factor αA
• Preload and tightening torques
• Securely fastened joints
• Shear loads for pins
• Construction recommendations
• Assembly tools

Metric Iso Threads

• Metric ISO threads

ISO 286-2: Tolerances, Tables, and Standards

• Basic tolerances / tolerance fields