Metric / Imperial Converter
Convert fastener dimensions between millimeters and inches.
FastenerBench
Tap Drill Calculator
Calculate a practical starting drill size for common cutting taps, then verify against the tap manufacturer or chart.
Thread Repair Selector
Match the type of thread damage and parent material to an appropriate repair path.
Thread Identifier
Use measured diameter and pitch to narrow down a likely thread specification.
Fastener Problem Solver
Start with the symptom and work toward the least destructive sensible repair.