Fastening Know-How

Online Calculators and Converters for Fasteners

Our calculators and converters are designed for engineers, technicians, industrial designers, and students involved in the development and assembly of bolted joints.

Online Unit Converters for Fasteners

Convert different units of measure, such as length, hardness, pressure, etc. using different systems such as CGS, SI, or the imperial system. Organized into specific topic areas, these converters streamline the selection process for maximum efficiency.

Converter Tool

Length Converter

Replace estimation with precision. Convert measurements between more than 68 different units of length.

Converter Tool

Torque Unit Converter

Use the right moment of force. Our torque converter tool ensures precise conversion between units or unit systems.

Converter Tool

Pressure Unit Converter

Handle pressure with ease. Effortlessly convert pressure measurements between different units or unit systems.

Converter Tool

Force Converter

May the (right) force be with you. This tool converts different force units and different unit systems.

Converter Tool

Hardness Converter

Measure up to the challenge. Convert the most common hardness scales such as Brinell (HB), Rockwell (HR), and Vickers (HV).

Converter Tool

Metric–Inch Fastener Converter

Bridge the gap between metric and inch fasteners. Input thread type and size and the mechanical property class.

Online Calculators for Design and Assembly

Looking for the perfect fit for your fastening solution? Use our design and assembly calculators to effectively size and apply your joining technology.

Geometrical Calculator Tool

Metric Thread Profile Calculator

Accurately determine metric thread dimensions, ensuring correct fit, complying with standards, and meeting design and manufacturing requirements.

Geometrical Calculator Tool

Pilot Hole Design for Metric Thread Formers

Determine the appropriate screw hole size for metric thread-forming screws.

Geometrical Calculator Tool

Drill Hole Size for Tapped Threads

Find out the correct tap drill size to determine the drill hole size before tapping for the most commonly used screws.

Geometrical Calculator Tool

Pilot Hole Design for ecosyn® plast

Calculate the optimal boss geometry for safe and easy screwing directly into various types of thermoplastics.

Geometrical Calculator Tool

Tolerances for Shafts and Holes

Identify the right tolerances for shafts and holes, based on standard tolerance classes, and limit deviations from ISO 286-2.

Mechanical Calculator Tool

Weight Calculator

Determine the approximate weight of fasteners based on type, size, and material.

Online Calculators for Technical Design of Your Fastener

Our calculators for technical design help you create strong, reliable connections with your fasteners. We support you in both sizing and designing aspects of joining technology.

Mechanical Calculator Tool

Estimation of Bolt Size and Property Class

Estimate the optimal dimension and strength a bolt should have for your application.

Mechanical Calculator Tool

Disc Spring Calculator

Determine the dimensions and properties of disc springs in accordance with DIN 2093.

TCO Calculator Tool

Cost Savings Calculator

Assess the savings potential for fasteners by analyzing the total cost of ownership (TCO).

Mechanical Calculator Tool

Thread Engagement Length Calculator

What is the minimum required thread engagement length for both blind-hole and through-hole applications? Calculate it

Torque and Preload Calculator

Considering Nut Factor (Inch) 

Determine the tightening torque and preload using the nut factor K for inch-sized screws.

Torque and Preload Calculator

Considering Nut Factor and Tool Accuracy (Inch)

Determine the tightening torque and preload using the nut factor K and wrench accuracy for imperial screws.

Torque and Preload Calculator

Considering Nut Factor and Tool Accuracy (Metric)

Determine the tightening torque and preload using the nut factor K and wrench accuracy for metric screws.

Torque and Preload Calculator

Considering Friction Scatter

Calculate tightening torque and preload for hex head and socket head screws, considering various friction coefficients.

Torque and Preload Calculator

Considering Customized Geometry and Material

Determine the tightening torque, preload, and surface pressure for hex head, socket head, and countersunk screws – all with various options for special geometry and strength of the selected fastener.

Torque and Preload Calculator

Standard Torque and Preload Calculator

Calculate tightening torque and preload and surface pressure for hex head and socket head screws.

Disclaimer

The engineering calculators are free to use under the terms and conditions. They are designed to facilitate and support you in product design and the results depend on the assumptions you provide. We do not guarantee their accuracy or applicability to your specific circumstances. Please contact us for thorough engineering advice.

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