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Engineering handbookWorkshop reference library.
Quick technical tables and formula summaries designed to work cleanly on a phone beside the job.
Reference
Metric Thread Chart
Common coarse metric pitches and approximate tapping drills.
Open table →ReferenceUNC and UNF Thread Chart
Common Unified thread sizes, TPI and drill references.
Open table →ReferenceDrill Size Chart
Metric, fractional and number drill references.
Open table →ReferenceMaterial Density Table
Approximate densities for common engineering materials.
Open table →ReferenceMetric Spanner Size Chart
Common across-flats sizes for metric hex fasteners.
Open table →ReferenceEngineering Formula Library
Fast access to mechanical, machining, electrical and fluid formulas.
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