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The Engineer's Reference.

Formulas, standards, materials, and design data — clear answers for the questions that come up at the workbench, on the drawing, and in the field.

Featured references

A small, hand-picked set of the lookups engineers reach for most often.

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Drill down into mechanical, materials, standards, electrical, and more.

Fasteners, bearings, gears, shafts, springs, and machine design.

Metals, polymers, composites — properties, treatments, and selection.

ASME, ISO, ASTM, ANSI — the specs you reference on every drawing.