Free Engineering Reference
Practical reference tables for everyday mechanical design work — dimensions, standards and tolerances.
BS EN 1092-1 dimension tables for DN10 to DN1600. PCD, bolt sizes, raised face diameter and more.
Schedule 40 / 80 wall thickness, BS EN 10255 pipe dimensions, outside diameters and bore sizes.
Metric tap drill sizes, clearance hole diameters and counterbore dimensions for M2 to M64.
Metric, BSP and UNC/UNF thread data — pitch, major/minor diameters and thread engagement depths.
ISO 286 hole and shaft tolerances, running clearance, transition and interference fit data.
Steel grade cross-reference, stainless steel properties, yield strength, and common material equivalents.
