Fasteners Engineering Tools
Bolt torque, tap drill sizes, clearance holes, thread pitch and workshop thread references in one practical fastener engineering hub.
Start with the job in front of you.
Bolt Torque Calculator
Estimate tightening torque from preload, diameter and nut factor.
Open →FastenersTap Drill Calculator
Estimate tapping drill size for common metric threads.
Open →FastenersClearance Hole Calculator
Look up close, normal and loose metric clearance holes.
Open →FastenersThread Pitch Calculator
Convert metric pitch and threads per inch.
Open →FastenersMetric Thread Chart
Reference common metric coarse thread dimensions.
Open →FastenersUNC / UNF Thread Chart
Workshop reference for Unified thread sizes.
Open →FastenersUnderstanding Bolt Preload
Learn why friction and clamp load matter when tightening fasteners.
Open →Calculate, then verify.
Imperametric is designed to get you from a workshop question to a useful first-pass answer quickly. Use the calculator or reference that matches the task, keep units consistent, and use the linked guidance to understand the assumptions behind the result.
- Check input units before relying on a result.
- Use manufacturer data, drawings and applicable standards for final specifications.
- Save frequently used tools to My Toolbox for faster return visits.
- For safety-critical work, independently verify calculations and installation requirements.
Build your workshop toolbox
Save the calculators you use most and keep recent calculation results on this device.
Open My ToolboxAll 35 tools