Practical torque specification guides for specific industries and applications.
102 models · torque, bolt pattern, thread and socket
Engine, suspension, brakes, and wheel torque guidelines
Torque specs by vehicle type for safe wheel installation
ASTM A325/A490 for building and bridge construction
Stem, seatpost, brakes, crankset — with carbon fiber warnings
Engine, chassis, suspension, brakes, and wheel torque
ASME B16.5 flanges, gasket factors, tightening sequences
The metric and imperial tables on this site are calculated from bolt strength: they tell you how hard a bolt of a given grade can be tightened. Application guides work the other way round. A wheel, a cylinder head or a pipe flange has a specification set by what the joint needs — gasket crush, clamping a brake rotor evenly, resisting a known load — and that figure is often well below what the bolt itself could take.
When a manufacturer's figure exists, it wins. Lug nut and head bolt values come from vehicle and engine documentation; structural bolting follows RCSC and AISC pretension tables; flange bolting follows a target bolt stress agreed with the gasket supplier. The guides explain those methods — staged tightening, angle torque, turn-of-nut, star patterns — and give typical figures, but they are a reference for checking a procedure, not a substitute for the service manual of the equipment in front of you.
If you only know the bolt size and grade, start with the torque calculator instead.