Engineering Reference

Charts

Dimensional, material and conversion tables — the fastest lookups on the site.

89 charts, grouped by what you are looking for.

Threads & fasteners · 15

Look up a thread size, its pitch and minor diameters, or the tap drill for it.

Materials · 15

Machining data and properties for steels, stainless, aluminium, cast iron and superalloys.

Sizes & dimensions · 26

Gauge charts, standard sizes and dimensional tables.

Tolerances & finishes · 13

ISO 286 grades, fits, surface finish and GD&T.

Electrical · 13

Conductor ampacity and current-carrying capacity.

Conversion & reference · 7

Unit conversions, formulas and reference tables.