Categories
Threads and bolted joints
Thread geometry, clearance holes, preload, torque, stress, and proof load.
07available
Choose the thread and hole, establish preload and torque, then verify stress and proof load.
Expansion prepared
Calculators in this category
01ISO 724 / ISO 965 / ISO 261
Metric Thread
Calculate ISO metric thread dimensions and limits.
Open calculator →02ISO 724:2023
Thread Tensile Stress Area
Calculate the nominal tensile stress area of an ISO metric thread.
Open calculator →03ISO 273:1979
Clearance Hole
Look up ISO 273 clearance-hole diameters.
Open calculator →04ISO 16047 / VDI 2230-1
Tightening Torque
Relate preload, friction, and tightening torque.
Open calculator →05ISO 16047 / VDI 2230-1
Bolt Preload
Calculate preload from torque and friction.
Open calculator →06VDI 2230-1
Bolt Stress
Assess combined tensile and torsional bolt stress.
Open calculator →07ISO 898-1
Proof Load
Determine proof load from property class and stress area.
Open calculator →